When I rebooted my computer this AM a number of icons on the desktop had been replaced with the windows default icon used when Windows can't find the icon specified. Also, I could not access a number of root folders and the programs in them would not run from system calls as in the startup process. I think I fixed the issue with "Take Ownership", as I can now access all of them. I haven't rebooted yet. The Icon issue is stranger. When I go to properties/change icon, I see the icon in the specified file but it isn't on the desktop. It does appear in Windows Explorer. If the file has more than one icon I can successfully set it to any of the others, but not the first one, regardless of how many times I change it. I haven't found a virus yet.