Repair repair win 7 by disk, USB does not lose data

Description: Repair win 7 is different from reinstalling win, it will repair the corrupt system files and bring back to default but keep the old data such as software, files, settings ... and often used Among the cases are as follows:

Repair win 7 is different from reinstalling win, it will repair the corrupt system files and bring back to default but keep the old data such as software, files, settings ... and often used Among the cases are as follows:
Computer, laptop virus system damage, win ... failure to get into windows -> Repair to virus scan or backup data and reinstall the win completely
Conflicts between software.
Computers have many unwanted bugs
Set password, but do not remember password or error due to Unikey
...
First to repair win 7 you need to prepare DVD or USB win 7 install corresponding to the windows you have installed and boot into win installation by pressing F8, F12 movie ... Depending on the computer line.


In the Install Now step below instead of choosing to install win then you will look down under Repair your computer

Make a selection as shown below and click Next


Continue to select Startup Repair.

Note in this step if the System Recovery Options window does not appear, select the option below and click Load Driver -> Next it will show up.

Then just wait for windows fix errors and log on to the normal computer


However, this repair win 7 will not help you reset the computer completely reinstalling the win so if the computer virus should be scanned by the effective software, or reinstall the win after retrieving the data in C drive through other drives