When a Windows XP user asks how to fix a problem they've recently started having with their PC my first response is to use System Restore to roll it back to a point just before the problem started.
Automate setting System Restore Points for Windows ME, XP. Set the number of days, and the time you want System Restore Points made. Set Point will do the rest. You always have a current Restore Point in the event you need to restore your computer.
