My Taskbar un-hides without me moving the mouse - or even touching the computer. Then, it usually quickly hides again. The icons on the far right of the Taskbar sometimes take over 20 seconds to appear - and that's after the computer has been running for awhile. Then, my Desktop will suddenly disappear momentarily - then come back. I ran System File Checker and it found problems. Before I upgraded from Windows 7, sfc was fine - no problems. I thought if I did a repair install of Windows 10, it might correct these problems - but I can't figure out how to do it. I made a couple of copies of the Windows 10 ISO - but that's only for a clean install. I've Googled for a solution with no luck. Can you advise me what else I can do? Thanks...........