AVG Technical FAQ - How to reboot your computer in Safe mode

Windows Safe Mode is a way to boot up the Windows operating system in order to let you troubleshoot or run administrative and diagnostic tasks. When it is booted into Safe Mode the operating system only loads the minimum software that is required for the operating system to work. Only basic video drivers are loaded so your programs may look different than normal.

Operation:

Restart your computer.

Immediately after "Starting Windows..." information is displayed, press the F8 key on your keyboard.

Select the Safe Mode option from the menu using the arrow keys.

Then press Enter on your keyboard to boot into Safe Mode.