Using F8 key (Recommended)
The process of starting into safe mode is similar in recent versions of Windows.
 XP Advanced Options |  Vista Advanced Options |  Windows 7 Advanced Options |
- Restart your computer
- Press and hold the F8 key for a couple of seconds, before the Windows logo appears as your computer boots. You might need to press the F8 key multiple times to enter the Advanced Options menu. If this doesn’t work try the F5 key.
- If your computer has multiple operating systems, highlight the operating system that you want to start in safe mode using arrow keys and then press F8.
- On the Advanced Options screen, select the safe mode option you want and then press the Enter key. Safe mode or Safe mode with Networking is appropriate for most situations.
- Log on to your PC with an account with administrative rights.
- When you are working in safe mode, you can see the words Safe mode in the corners of the screen. You can exit safe mode anytime by restarting Windows normally.