Watch more How to Understand Computers videos: http://www.howcast.com/videos/313374-How-to-Boot-Your-Computer-in-Safe-Mode
Maintaining your computer sometimes requires you to boot up in safe mode to fix problems or save your work.
Step 1: Restart or turn on your computer
Turn on your computer or restart it by going to the Start menu, clicking on Shut Down, selecting Restart, and clicking OK. For Vista users, go into the Start menu, click on the arrow to the right of the padlock icon, and select Restart.
Tip
If you're computer is frozen, hold Control, Alt, and Delete to bring up a window with the option to restart your computer
Step 2: Tap F8 while computer is booting
Tap the F8 key at a steady pace while the computer boots, until the Windows Advanced Options menu appears.
Step 3: Select Safe Mode option
Use the arrow keys to move the highlight bar to the Safe Mode option located at the top of the menu. Once this is highlighted, press Enter.
Step 4: Choose your operating system
Choose the operating system you want to boot by moving the highlight bar over it and then pressing Enter.
Step 5: Select Yes for entering safe mode
Confirm your choice to run in safe mode by selecting Yes in the dialogue box. You're now running your computer in safe mode.
Did You Know?
Running anti-virus and anti-spyware scans in Safe Mode makes them both faster and more effective.