J'ai trouvé cette manip:
In XP, select Run from your start menu.
Type "regedit" in the box and click OK.
Once you're in Regedit, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\RemoteComputer\NameSpace
Now, simply delete the two keys (a bunch of long numbers and letters) under this, which are the "Printers" and "Scheduled Tasks" keys.
c'est ca ?