System Restore is a Microsoft Windows feature that allows you to set your settings to a stable state in the event there is a malfunction. Moreover, Safe Mode is a specialized Windows session optimized for testing and troubleshooting purposes. As only essential processes and services are enabled, this allows you to perform any system diagnostics without potential third-party software or hardware bugs. Depending on the severity of the issue at hand, it is often wise to restore your computer within Safe Mode.
Turn on or restart your computer and press “F8” on your keyboard during the power-on self-test procedure (before the Windows logo is displayed). This will bring you to the Windows Advanced Options menu. Select “Safe Mode” from the list of available choices and press “Enter.”
Log into your Windows account as you normally would by entering your username and password, After login in, click Start, choose all Programs>Accessories> then choose System Tools to launch “System Restore.”
Click “Next” once the System Restore wizard launches. The most recent restore points are immediately shown. If you wish to select an older restore point, enable “Show More Restore Points.” Select any one from the available list and click “Next” to continue.
Click “Finish” to initialize the System Restore procedure. Once finished, your computer will restart and launch into your regular Windows session.
Culled from eHow