On my last Rollback install - KIS appears to be corrupting systems files and itself upon shutdown. This appears to be happening When the system is shut down. I have replaced the disk , controller and cables the problem persists. If I remove KIS the problem is solved I have been using Version 220.127.116.113 # Version 18.104.22.1680 was fine # Version 22.214.171.1241 not tried # KAV was always fine before So having tested everything and then removed KIS I have deduced that KIS is the source of the problem. I'm not sure if it is the interaction of the 2 products or the recent ms updates. Corrupting the system every boot cycle even with a recovery product in place is not workable. I have raised a couple of support notes but in the mean time ... Anyone one else had problems?