In order to reboot your PC in Safe Mode, do the following:
Go to Start > Shut Down > Restart
Keep pressing the key F8 during the first seconds the PC is being booted until you see the Windows Advanced Options Menu.
On some computer configurations the key F8 is used to select a physical drive to boot from. In this case select a hard disk drive with installed OS. Once you have pressed Enter, keep pressing F8 until Windows Advanced Options Menu is displayed.
Select Safe mode
press the Enter key
press the Enter key to confirm the selected variant
reboot the PC after finishing work in this mode
For Windows 2000, XP, Vista, 7 a password of the local user Administrator is required
If a computer boots only in normal mode and "blue screen" when choosing safe mode, it is possible that the registry branch Safeboot responsible for booting in safe mode is damaged. The registry branch Safeboot can be restored using a previously imported .reg file. In order to do this, perform the following actions: