Hi,
The majority of the time this is caused by a corrupt restore point. Turning
System Restore off then on again will purges all existing restore points, and
creates one new one.
Try running System Restore from Safe Mode.
Restart your computer, and then press F8 during the initial startup to start
your computer in Safe Mode.
Log on to your computer with an administrator account or with an account that
has administrator credentials.
In Safe Mode type or paste the following command in the Start - Run box then
press Enter.
%systemroot%\system32\restore\rstrui.exe
There are also other possibilities that can cause this to happen. The following
pages have some troubleshooting steps to take.
Troubleshooting steps to take when System Restore fails to restore:
http://bertk.mvps.org/html/srfail.html
How to Disable and Enable System Restore
http://bertk.mvps.org/html/disablesr.html
Here are some tips on keeping System Restore Healthy and hopefully
keep the restore points from becoming corrupted in the future.
http://bertk.mvps.org/html/healthy.htm