Activate Safe Mode in win 7

1. Determine if you need to run safe mode. Safe mode works by only allowing the most essential files and drivers to load. Anything which is not required to boot the operating system (like start-up software) is not loaded. If you are having trouble booting your computer or something is acting fishy shortly after starting up your machine, reboot in safe mode.
2. Remove all disks from the computer. This includes CDs, DVDs, floppy disks and USB drives. After you do this, restart the computer.
3. Press and hold the "F8" key while your computer restarts. Make sure you do this before the Windows splash screen appears (this is the black screen with the Windows logo). If the splash screen appears, restart the computer again and try again.
4. Proceed to the "Advanced Boot Options" screen. This menu will load if you pressed F8, and will prompt you to choose between 3 options for booting your computer.
5. The first option is safe mode. This is the best option if you aren't sure what you should choose. This option will load the fewest drivers necessary to boot Windows 7.
6. The second option is safe mode with networking. This option loads all the drivers and files that the first option does, but also loads any processes that are needed to allow networking. Choose this option if you think you'll need to get on the Internet or your local network while troubleshooting.
7. The third option is safe mode with command prompt. This mode loads the same processes as the first option but gives you immediate access to the command prompt. This option is suited for advanced users who need to do difficult troubleshooting.
8. Wait for the necessary files to load. The next screen will show every file that is being loaded. You don't need to do anything while this is happening unless the files do not all load correctly. If the screen freezes at this point, make a note of the last file that successfully loaded and then search the Internet for troubleshooting tips based on that information.
9. Log into Windows 7. When the login screen appears, log in to an account with administrator privileges. If you only have 1 user account on your computer, it is likely that it has administrator privileges.
10. Enter into Windows 7 safe mode. You will know if your computer is in safe mode because "Safe Mode" will be written in all 4 corners of the screen. Fix whatever problems you need to and then restart your computer normally