You don't have to do anything. Hopefully the edit will correct the problem on reboot. Kelly Theriot (Kelly's Korner) is a much respected and highly regarded Microsoft XP expert and her edits and scripts among other tweaks etc help folks the world over. While no guarantee is given or offered to resolve your particular issue, if you don't try, you'll never know.
If you feel uncomfortable altering the registry, make a back up first to refere back to if necessary:
Start > Run > Type Regedit > OK > File > Export > Chose a location > Give it a name, say date > Save. Reversal is by Importing in the same file menu.