Turn off the Low Disk Space Notification alert iin Windows XP

Click Start, Run from the Start menu, type regedit and clicking OK. Once in the Registry Editor, navigate to:

HKEY CURRENT USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

In the right side, look for the value NoLowDiskSpaceChecks. If it's not there, add a new DWORD Value from the Edit menu, name it NoLowDiskSpaceChecks and press Enter.

Now, double-click on the NoLowDiskSpaceChecks entry and change the its value to 1 in the Value Data field. Click OK and you are done.