As per my previous post,
After something like this it is a good idea to Flush the Restore Points and start fresh.
To flush the XP system Restore Points.

Go to Start>Run and type msconfig. Press enter.

When msconfig opens, click the Launch System Restore Button.
On the next page, click the System Restore Settings link on the left.

Check the box labelled 'Turn off System restore'.

Reboot. Go back in and Turn System Restore Back on. A new Restore Point will be created.

Note that all previous restore points will be lost.
that will take care of it .