hi there .
i may have found a solution to your problem.System Restore files have
become corrupted. To fix this, you'll need to switch System Restore
off, reboot, then switch it back on again. Unfortunately, you'll lose
all your existing restore points in the process, but it should get
System Restore back in working order once more:
1. Right-click My Computer and choose Properties to open the System
Properties dialog.
2. Click the System Restore tab.
3. Tick Turn Off System Restore On All Drives, click OK and then
reboot.
4. Open the System Properties dialog once more, untick the box you just
ticked, and off you go.
System Restore doesn't have enough space to work. It needs at least
200M. Do a file clean up to ensure it has some elbow room.
You have a Spyware or virus infection. Do thorough scans for these
problems, then try System Restore again.
Locked files are causing System Restore to fail. This is an issue that
was addressed in XP Service Pack 1, so it shouldn't be affecting you.
But it's possible that a crucial system file is locked and interrupting
the process. Try running System Restore in Safe Mode to see if that
helps.
Try an earlier restore point. You may have to do some more work to
bring your system up to date after the rollback, but an earlier point
sometimes works when a more recent one fails.