Sorry for delay reply. First of all I hate with this new site. I do not know why MS moved QnA on this portal .
After verification, I found that local IT had moved computers from one ou to other OU but still event viewers had many events for old GPO. But GPO were not applying so I think events are ok because it was not creating any problem. So I left it at local IT to find out some local repository which probably had stored some cache of GPO, may be somewhere in registry.