MS-MVP Jim Pickering advises the following as one approach to these
problems: Restart the computer. Press F8 during the restart and select "
Last Known Good Configuration." If you catch the problem when it first
occurs (meaning you likely have installed only one or two drivers or new
service), this will return you to a previous working condition. System
Restore provides an alternate approach, especially if you need to go back
further than the last known good configuration, and Device Manager provides
a tool for rolling back to an earlier driver.
