1. Restart your computer and start pressing the F8 key on your keyboard. On a computer that is configured for booting to multiple operating systems, you can press the F8 key when the Boot Menu appears.
2. Select an option when the Windows Advanced Options menu appears, and then press ENTER.
3. When the Boot menu appears again, and the words "Safe Mode" appear in blue at the bottom, select the installation that you want to start, and then press ENTER.
That will put it into safe mode, but to do a system restore, you don't necessarily have to do that.
There is a much MUCH easier way to put your PC into Safemode without hovering over an F key.
Start-Run----msconfig. Choose the Boot.ini tab and check safemode.
I really hate having to hover and wait for that split second to push the button LOL