I started Disk Cleanup with 'Run as Administrator' clicked on 'Clean up' under System Restore & Shadow Copies.
However, it did not delete the restore points, I tried three times, rebooting the computer after each attempt, and the restore points were never deleted. I eventually had to just turn SR off and back on to clear the restore points
I am on an HP laptop running Win 7 Home Premium. I have never had this issue on my desktop which runs ultimate.
Does anyone know what might cause this behavior?