Chami.com Tips

Whoops! I shouldn't have done that!

If you change a device driver either by mistake or just to test it, and unable to restart your Windows NT system, you can use the "Last Known Good Control Set" menu (which appears during Windows NT bootup) to go back to where you were before the error occurred. The last known control set is able to do this by keeping a backup copy of [some of] the system configuration files from the last successful boot. This of course means that you can only go back to the settings which you had at the last successful boot.