Using an OptiPlex 3020 which was upgraded to Windows 10 Pro from Windows 7 Pro. I wanted to do a system restore to a previous date and a window appeared after the attempt stating the System Restore did not complete successfully and the computer's system files and settings were not changed. When I attempted to restore to another restore point, the same window appeared. All my attempts to restore to a previous point show the same window. System restore was working fine since the free upgrade last year until now. What do I need to do to get this System Restore procedure to work again?