Computer data recovery: How does computer crash happen?

Computer now is a necessity for office workers, students and also housewife. Most of people may have encountered the troubles of sudden computer crash. Usually, it will not be too serious, we just need to reboot the computer to solve this problem. But most people do not  know the causes, they may suffer a data loss in this process. Today, here I ‘d like to share the causes of sudden crash and the solutions.

Crash is one of the most common computer failure, and the most difficult failure to find the causes.

 Generally, the computer crash can be classified into 4 main types:

First, The computer crashes in booting. If the user only hear the sound of the hard drive when boot, and can not see any thing on screen, or computer stridulated at POST time did not work, error prompts occurred;

Second, Computer crashed when start operating system. The screen post have complete when boot, but the crash happen when it about to enter the operating system.

Third, Computer crash in using. The computer is always in good condition. But it suddenly crashed after we have performed some programs.

Fourth, Computer crashes occurs when exiting the operating system. When you exit Windows7 systems or back to DOS status, the computer crashes happen. As in the computer crashes state, we can not use the software or tools to diagnose the system. It increased the difficulty of troubleshooting. The general performance of the crash are: system cannot not boot, show black screen, the keyboard can not input, the software’s irregular interruption.

There are two main causes: the hardware failure; the imperfect software designation conflicted with the system or other working programs.

If it is a software conflict, you just need to check and the delete or close the corresponding software. As to the simple crash, we can deal with by shut off the computer. But to solve the crashes caused by system failure or hardware failure, we need the specialist’s help.

If you have a data loss from computer hardware failure, you should not restore it by yourself. To avoid second damage to your data, you’d better contact the data recovery team to find the best solution.

How to recover data when my laptop has a blue screen and crash?

Since the laptop is easy to carry and operate, it is very popular among IT enthusiasts. Many people may have encountered the laptop problem of blue screen or crash in using. But these problems will bring us great trouble. It’s difficult for  most of people, especially for those who have relatively poor computer knowledge. How to recover data when the laptop has a blue screen? To solve these problems, Hdata recovery center has summarized some methods to deal with  blue screen and crash of laptop.

There are some tips to for laptop repair

1. First, we should exclude these problems like memory, hard disk, dust, system. Generally speaking, there are lots of causes for blue screen and crash. First, you need to exclude the system problem. The best way is to replace a hard disk with a good system.

2. BIOS test. Initialize the BIOS and discharging the CMOS. The error setting of BIOS may lead to blue screen when you boot. If you have this problem, you can directly adjust BIOS to solve it.

3. Voltage problems. Test computer voltages to know if they are normal. If  you found the voltage is low, unstable or fluctuate widely. For example, 1.5V voltage enter into the system and become 1.2V,  that will lead to blue screen. If yes, then you need to debug voltage, or replace the interface.

4. South bridge and peripheral issues. Southbridge mainly manages the external device.  Southbridge failure will cause a blue screen. In addition, this will also affect the peripheral fault. In our usual maintenance, we can first enter the safe mode to see if there are blue screen and crash without loading any drivers. If there is no problem, the problem may be in the South Bridge, sound card, network card,  the card reader chip, or the1394 chip. Sometimes you need to unplug peripherals, try one by one. After exclude all the problems, you can make a target repair.

5. North bridge settings. North bridge is direct communication with the CPU and memory. The communication failure between them can also cause problems of blue screen, crashes, can not enter the system. Northbridge failure is not easy to  be repaired, we need to find a professional service center for repair.

6. The clock problem. Clock is a necessary condition for the normal working of computer motherboard. Due to the higher frequency of clock, the probability of failure will be relatively high. When blue Screen and crash happen, you need to measure the waveform, frequency of CLK to ensure its normal work.

7. Graphics problems. If the laptop has a separate graphics, the display chip , CPU, memory have a too high temperature may lead the laptop is easy to get blue screen and crash. The solution is to replace a graphics card, or download a detection tool to check and repair.

8. The hard disk settings issues. If the notebook computer's hard disk has an IDE interface, but the BIOS settings are ATA, it may have blue screen. Because you may have unplugged BIOS battery when doing BGA and then cause it to restore the factory settings of ATA status. Sometimes you may have restored to BIOS by yourself.

And these are the common cause for blue screen and crash. You need to pay more attention,  if you are lack of professional computer knowledge, you’d better ask data recovery center for help. If you blindly try to repair by yourself ,you may suffer more data loss.

How to recover data when I cannot open my U disk?

U disk  has been the most widely used data storage devices. But the quality of  U disk is directly related to the data storage. If consumers buy cheap to buy a poor quality U disk, they will be some data loss over time. Therefore I suggest that you to choose a U disk extremely careful. Do not store important confidential files on the U disk, especially when you have no backup. Even you have bought a genuine U disk, it also may have problems as you use it in a variety of complex environments after a long-term use. Once found  problems during transmission, it will lead to the destruction of data transmission channel, then to disrupt the structure of U disk data storage. Data loss then happen, Finally, you are unable to open U disk.

As we all know, you will have no way to read your data once the U disk can not be opened . What should we do? In fact, this problem is not uncommon. As the use environment of U disk is very complex, and using habit of each user is different. The complex environment and inappropriate using  are easily lead to U disk problems. Especially in the current market, a lot of businesses produce a lot of poor quality and low price U disk in order to reap huge profits. However, the manufacturers have reduced a large number of components for data transmission due to  its low cost. The data transmission of their U disk is extremely unstable so that easily to cause data failure.

So we should learn something to, avoid buying poor quality U disk:

1. Select  major brands

As  the brand is a guarantee of quality. Try to choose a major brand. Now U disk manufacturers such as Patriot, Kingston have get involved in U disk market for a long time. They have formed a complete system of research and development, investment and market service. You can reset assured that choose to use theses U disks. Some small factories often sell at low prices to attract the attention of consumers as their poor quality.

2. Select an appropriate capacity

Capacity is a determining factor in the U disk prices. The larger the capacity, the higher the price. You should not blindly to choose a  large-capacity U disk.  Just choose the capacity you need

3. Pay attention to the seismic safety of the U disk

 Seismic safety  of U disk is a very important indicator. If U disk has a poor seismic safety performance,  the U disk is easy to be damaged and the stored important data is easy to be lost. Therefore, it’s important to buy a U disk of good seismic safety.

 So how should we notice when using U disk?  Does it mean that we cannot get back our data as it cannot been opened? That’s not true. Hdata recovery center has more than a decade of experience in data recovery, they know U disk well , especially U disk circuit design. They will give a professional answer if you have problems.

How to recover data from shredded by security software?

Security software currently account for a large proportion of the software market share. They have a large amount of download. Most of them are free, safe and easy to use. So they get a lot of acceptance from users. They usually are integration of many kinds of  applications, at he same time, including file shredding function. We can use this function to delete  those files which can not be completely removed. But at the same time, by using this function, sometimes we may accidentally deleted some important files. If we have done that, how do we retrieve it?

In fact, using security software to shatter files for file deletion will cause some damage, because it is a forced delete. It delete the file completely than the usual method we use, such as , delete them to the Recycle Bin or directly shift + del to delete. Therefore, it’s  not easy for common data recovery software to recover deleted files in that case. Even if it can recover some data, it is difficult to achieve a full data recovery. Especially when large amount of data files were crushed, the special data processing module of security software will disrupt data, which resulted in enhancing the difficulty of data recovery. From the data security, the software really helps improve the safety of  deleted files. But sometimes the data were accidentally deleted or maliciously destroyed, how we can we restore the data after have smashed it?

The best way is to send our data storage device to a professional recovery center for recovery. In general, a professional data recovery agency is equipped with a large number of high-tech equipment to help data recovery, and their data recovery engineers has rich data recovery business experience. The strong team data recovery team  can help you to recover your data back.  Here I want to give you a few tips for correct files deletion

1. Carefully check the files before you empty the Recycle Bin. Only you are sure that they are unused files, can you delete them from recycle bin.

2. Create a temporary folder. Move the files need to be delete into the folder. Check carefully before you want to delete the root directory, and its every files, before delete.

3. Do not use “shift + del” combination key to permanently delete files . That may increase the difficulty to recover.

At the same time, we also need to find a professional data recovery center.  Choose a trustworthy organization, to avoid secondary damage to the data.

Hope you can attach great importance on your data security.

How to recover data when USB device cannot be recognized?

We usually use U disk, mobile HD, memory card to  store data for its compact but large storage capacity. However, in the process of using these devices, many users have encountered many problems .Sometimes, when you connect the device to the computer, it will pop up a prompt that  "Unrecognized USB Device". So  users can not use their own USB devices. Many users feel very puzzled about this situation but do not to know how to solve this problem and at the same time to protect their data. Today I would like to talk about this case, and to find out the solutions after the USB device can not be recognized.

There are many reasons for unrecognized USB device. Next I will show you some common causes.

1.      USB device is damaged.

You can judge by inset it into another computer. If it can be recognized, you can be sure that it is the USB itself. You can only replace it.

2.      Interface failure.

If the USB can be recognized on other computer, it is the USB interface failure. The interface failure can be various like , you have mixed the positive and negative line of USB, low-voltage of pre-interface. You can insert it into the rear interface.

3.      Driver problems.

If you have exclude the above two problems, that may be the drive problems. You can use a upgrading software to update driver.

4.      System or bios problem

If you have banned USB in BIOS or system, the USB device will not be recognized.

The solution is to active options related to USB device. After boot, press F2 or DEL key to enter BIOS, choose to enable USB device.

5.      The abnormal power-off of USB device

Another cause is that the USB device may have a sudden power-off. You can choose device manager on your computer, and then click Universal Serial Bus Controllers to delete all the options related to USB. Plug out USB device and inset it again, reinstall the drive.

The above five are the most common causes. Generally, we just need to modify device and upgrade driver to solve the problem. But the disabled recognition caused by hardware can not be restore by yourself. You can ask the Hdata recovery center to help solve this problem.

How to recover data from a crashed computer

Computer crash is a very common for us.  However, many people do not know exactly why there is a computer crash. Once the crash happen, it usually shows as "blue screen", and then the system can not start.  Now I’d like to introduce what are the causes for computer crashes.

First, Computer crash caused by hardware

1.  The board capacitor. Sometimes, other computer hardware is good, but it will always crash  when boot. It may for  the bad capacitor of motherboard.

2.  Poor heat dissipation. The monitor, CPU and power will produce great heat in the work. Hear dissipation is very important. The overheating of the display will cause distortion of colors and pictures, or even shorten the life of display. The long working hours can lead to poor heat dissipate of power or display, then cause computer crashes.

3.  The inappropriate movement of computer. The movement may intensively shake the computer, which lead to the loose of inner parts, causing imperfect contacts then cause computer crash.

3.  Dust. Too much dust in machine can cause frequent crash failures. If the floppy drive head or the laser head are contaminated by dust, it’s easy to have a  read and write errors, or even cause serious computer crash.

4.  The devices are not match. For example, the motherboard processor frequency and CPU frequency does not match. The old motherboard overclocking while the FSB setting is too high. That may influence the stability of operation, resulting in the crash.

5.  Memory failure. The main causes are memory loose, weld or memory chip quality. You should exclude these failures based on the situation. If it is the memory quality problems, you need to replace one.

6.   Hard disk failure. This is due to hard disk aging or improper use that cause bad tracks, bad sectors.  So when the machine is running, it is prone to crashes. If the problem is serious when you check, you can only change a hard drive.

7. CPU overclocking. Overclocking can improve the work efficiency, but also can cause the instability of its property. Because the data writing and reading speed are depends on  the exchange speed of data between memory and hard disk. Overclocking results a more serious  contradiction between them.

Second, Computer crash caused by software upgrading

1.  The virus infection. The virus can reduce your computer work efficiency, resulting in frequent crashes. In that case, we can use the antivirus software to kill virus.

2.  The software improper upgrading. Many people may thought that the upgrading will not be a problem. But  they do not know when the software is upgraded, some components are also upgraded. However, other programs may not support the upgraded components so that leading to various problems.

3.  Illegal uninstall software.

You’d better not to directly delete the directory which contain the software. There may be a lot of garbage exists  if you directly delete the directory. The system will become unstable over time so that crashes happen.

4.  Too many start-up programs. These programs may take up too many system resources which lead to the needed data for some programs appear error in memory.

The frequent crashes will greatly affect the progress of our work. And if t computer crashes happen when it is writing important data, the unsaved data will be lost. That may cause great inconvenience for us. Therefore, we suggest you to know the specific causes for computer crashes. And if you have other problem in data recovery, you’d better ask Hdata recovery specialists to help you.

How to recover data from SD card failure?

SD cards are widely used as a storage medium in mobile phone and camera. Its compact body and high-capacity have brought us a lot of convenience. However, the card does not actually solid as we imagined. SD card is easy to be damaged for a little errors such as inappropriate operation or plug method. Although replacing a card is quite easy as the price is low, the data loss in the SD card may be serious.

How can we repair the SD card and how can we recover data ?

The reasons for SD card failure are as follows:

1.      SD card prompts it has not been formatted, and the files or directory are damaged.

2.      SD card have lost some or all data. You cannot open the videos, photos.

3.       SD card has  a physical bad block, it cannot been recognized.

4.      After connecting it to computer, it cannot be recognized but the card reader can be recognized.

5.      SD card is destroyed by virus. All files are messy code after opening them.

6.       Human misoperation such as accident deletion, format, causing the data loss.

How can we repair it?

First of all, we do not need to direct format it. We can do it by ourselves.

1.      Turn your phone off. If it has no response, you can directly put the cell out to shutdown.

2.      Press power button and volume key together to boot it, get into recovery.

3.       Connect phone to computer, find the USB option.

4.      Then the computer can read the SD card.

5.      Enter “my computer” or “computer”, find the drive letter of SD card, such as G disk. Remember this letter.

6.      Click open menu, choose open—run, input chkdsk G:/f

7.      The screen will pos up a restoration interface automatically. You just need to wait the restoration finish.

8.      Press the light sensation key on phone  enter into recovery, choose to reboot your phone.

9.      If everything goes well, you can get all your data back.

If you cannot recover your data by this way, you’d better ask data recovery engineers to help you. You cannot repair your SD card by yourself in that case. 

Data recovery and computer maintenance

Computer has take up a lot of our times. We use it to work in office and play computer games in leisure time. Most of us do not know how to repair when there are some problems in use. Although it’s difficult  for us to learn these complicated reparation, it will be useful if we know some basic knowledge.

Before computer maintenance, we should learn observe and judge by ourselves.

First, the observation.

1.      Observe the computer’s environment, position, power, connectivity, temperature, humidity, and other equipments.

2.      The performance of the computer, the displayed content, and their different places in use under normal conditions.

3.      The computer's internal environmental conditions: dust, connectivity, color device, indicator status.

4.      Computer hardware and software configuration: installed what kind of software, hardware, and the  usage of other resources.

Second, know how to deal with after observation.

1.    To  analyze and judge before you can repair.

2.    Consult relevant information according to the phenomenon to see if there is some corresponding technical requirements, and then to repair it. Finally, your  analysis and judgment should be based on your existing knowledge and experience. Consult a professional if you don’t know the problems well.

Third, check the software first, and then the hardware.

The first things is to judge if it is a software failure. And then check the software. If there is no wrong with the software, or you have fixed the software failure, the computer failure still not disappear, you need to check the hardware.

Fourth, you need to prioritize in maintenance process.

You may notice that a machine has more than one failure. When it has two or more than two failures, you should determine the main symptoms and repair them first. Then other minor symptoms. Sometimes, you may not need to repair them after  the main failure has been solved.

Fifth, the basic method of computer maintenance.

1.     Observation

.Including the surrounding environment, hardware environment, plugs, seats and ducts, as well as software environment and user’s operation habits and procedures.

2.      The minimum system method.

This means that, the basic hardware and software environment which enables a computer to boot or run, from the perspective of maintenance.

Minimum hardware system: is made up of the power supply, main board and cpu. In this system, there are no connection to signal line, only the power connected to the motherboard.

Minimum software system: is made up of the power supply, motherboard, cpu, memory, graphics card / monitor, keyboard and hard disks. This minimal system is mainly used to judge whether the system can boot or run normally.

For minimum software environment, we need to pay attention . Keep the original software environment to judge the application problems. You can uninstalling or masking as needed.

3. The gradual addition / removal method.

Gradual addition method is based on minimize system. By adding to the system one device or software each time, you could check whether the failure disappeared or changed so that to judge and locate the failure position.

The gradual removal method and just opposite the gradual addition method in operation.

So, people need to know more about the knowledge of computer maintenance. You are able to roughly determine that what is the problem. If there is a problem of data recovery, you can also consult Hdata recovery center.

Data recovery and how to diagnose the hard drive physical failure

All computer have hard disks. Once the hard disk are damaged,  the data stored on hard drive may be lost. That must be a great loss for anyone. So we need to pay attention to check the hard drive regularly, and know how to diagnose the external physical failure.

Now let us take a look at what are the difference between solid-state hard drive and regular hard drive.

1. Solid-state hard disk has a faster read and write speed.  Since the solid-state drive uses flash memory as its storage medium, it will be faster, compared with mechanical hard disk. SSDs have no head, seek time is almost zero. SSD’s sustained read and write speed is more than 500MB / s, which far more than the regular hard disk speed of 100MB / s.

2. SSDs are more shake-proof and have a lower noise. Since in the internal of solid-state hard drive, there is not head. Its operating temperature range is relatively wide. Because there is no mechanical motor and fan in a SSD, the operating noise is almost zero. It has no internal mechanical moving parts, causing no mechanical failure and no collision or vibration.

3. The SSD has a restricted life. SSDs have a fixed number of times to read and write. But the regular hard disks are less affected from read and write.

Then we can take a look at the  hard disk physical failure detection.

As we all know, hard disk failures are divided into physical and logical failure. Here I’d like to talk about the diagnosis of  physical failure.

External hard drive failures mainly refers to the circuit board failure. Hard drive circuit board is generally divided into six panels. Circuit boards mainly have the main chip, cache, motor driver chip, BIOS and electronic components, etc. Circuit boards the failures are generally as follows:

1.A power supply failure.

The power of hard disk mainly from the switching power supply of host. Four terminal voltages are: red for positive 5V, black for the earth, yellow is positive 12V. Use the linear power to convert circuits, converting into the voltage the  hard disk need for  normal working. If there is a problem in power supply circuit of hard drive, the hard disk can not work. The performance can be no power, can not detect hard disk,  the disc does not rotate, the head does not seek. Parts of the power supply circuit often have problems: the socket terminal, filter capacitors, diodes, transistors, and insurance resistors.

2.Interface failure.

In fact, the interface is the path to transfer data between the hard disk and the computer. If the interface circuit fails, it may lead to a hard disk is not detected, messy code, parameters misidentification etc. Parts of the interface failure are usually interface chip and its matching crystal, broken interface pins, empty solder interfaces, interfaces exclusion damage and so on.

3.Cache fault.

Caching is used to speed up the hard disk data transmission. If there is a problem, it may lead to the hard disk cannot been recognized,  appearing messy code and abnormal crash.

4.  BIOS failure.

BIOS is used to save parameters such as hard disk capacity, interface information etc. All the hard work processes are related with BIOS . The moment of electricity on off may lead to the loss or chaos of BIOS program. If BIOS is abnormal, the hard drive can not recognize.

Therefore, if the hard disk is damaged, you can ask Hdata recovery engineers to help you.

Data recovery : Causes of hard disk bad track and how to repair?

Hard disk is the main storage medium of computer. It is made of disk of aluminum or glass. The disk is covered with ferromagnetic materials. As a part of workload-intensive, it is easy to be damaged. What can we do when the hard drive bad track happen?

First of all, we should often on high alert for bad track. In these cases, your hard disk may have a bad track.

1.      You open a file or run a program, the hard disk load and repeated error. It prompts file damage.

2.      The sound of disk is quite strange.

3.      The progress bar has stalled when you format the disk. Finally it report error and cannot finish format.

4.      The system will automatic perform scandisk scanning program.

5.      When you perform Fdisk, the progress bar will back and forth so that you cannot complete scanning.

It cannot get through the boot system after start-up. Boot form the floppy disk, it can see the letter of hard disk but cannot access hard disk. The SYS command passing system also does not help. That may be problems in boot sector of hard disk.

Then we need to know the causes of bad track and how to protect hard drive.

1.      Abnormal shut-down. The sudden shut-down of computer while the hard disk is still in working condition may easy cause bad track. The head is keep running when the hard disk is running. The sudden shut-down lead to returned to its place. The friction between head and platter is too intensive.

2.      Static electricity will cause hard drive damage. The human body normally has static electricity, especially in winter. If you touch the hard disk when you are carrying static electricity, the component in hard disk may be damaged so that the hard  drive cannot work.

3.      Excessive heat will damage the hard disk. The hard disk produces heat when working. The normal temperature is between 20 degree centigrade and 25 degree centigrade. Above 25 degree centigrade may cause component failure. Below this temperature, the water molecules in air will be condensed and then on the hard drive. That may cause short circuit of hard disk.

4.      Accumulated dusk cause damage. The damage caused by dust can be fatal. The hard drive must be no dust at all. The contact between head and platter are very tight. If dust fall into this area, your disk will damaged soon.

These are the reasons for bad track. To avoid bad track, you should protect and maintenance your hard drive carefully. And once you make sure that your hard disk has a bad track, do not try to repair it by yourself. You should ask the data recovery engineers to help you, and then try a professional data recovery software.