Windows XP has a vast number of configuration dialogs, but some adjustments can be performed only by directly editing the Registry. Frequently, tips involving Registry tweaks include stern warnings to back up the Registry before making any change. The Windows XP Backup applet can back up the Registry along with other elements of the System State, but the resulting data file can occupy hundreds of megabytes. You're better off saving a system restore point each time you're about to edit the Registry. Better still, you can use Regedit to back up only the Registry keys that will be changed.
