Hard drive data recovery problems mainly include two categories: logical problems and hardware problems, the corresponding recovery were also known as the logical recovery and hardware recovery. Logical recovery is the way via software data recovery, the whole process does not involve hardware maintenance.The reasons for the data disaster often is viral infection,mistakenly formatting, partition error, error cloning, accidentally deleted, the operation power and so on.
   The phenomenon of logic fault: lack of access to the operating system, the file can not be read, the file can not be opened by the related application,the file is missing, partition loss, garbled displays.In fact,the reasons for logical data loss is very complex, each case has a specific symptom or multiple symptoms simultaneously.Under normal circumstances, as long as the data area has not been completely covered,it can all be successfully restored.
Accidentally deleted
    Misoperation caused files are missing,for such failure, with high levels of data recovery success rate.Even the latter part implement other operations,but also could recover the data.
Format error
    After the system crashed,users forgot the hard drive (usually C drive) stored some important information,and format and reinstall the system,in this situation hard drive data also can be recovered.
Wrong partition, error cloning
    In the use of PQ Magic and Ghost,because the user’s misoperation caused data loss,such logic faults can also restore data,but the degree of difficulty are large for recovery.
Virus attack
    The chances of the virus to destroy data is great,it destroys the data in different ways: the first is the hard disk partition table change, so that partition is lost,and the second is to delete your file,mainly damage several types of documents(word, excel, jpg, mpg, etc.),such as the latest mobile killer,it complete delete Word documents of the hard disk, resulting in tremendous destructive power. For the loss data caused by virus attack,hard drive data recovery also has a high success rate.
File corruption
    Most file corruption cases are related to anti-virus, the infected file is not open after the anti-virus, and other methods can also lead to file corruption, such as a software is installed, run a program, or encountered hacker attacks.In such cases you can restore these files, retrieve the data you want.
Note (you need to know)
    1, when you find data loss,Do not attempt any operation, especially the operation written on the hard disk,it will easily cover the data
    2, if the missing data is in the C drive,then immediately shut down,because the operating system run-time generated by the virtual memory and temporary files will also destroy the data.
    3, Please Do not try Windows System Restore feature, which does not help you retrieve lost files,it will only add unnecessary obstacles the latter part of the recovery.
    4, please do not re-use antivirus software, these operations can not retrieve lost files.
If your computer has a fault that possible loss important data , and you are not grasp about it,you had better go to a professional hard drive data recovery center.
