I recently installed Windows 7 Enterprise over Windows 7 Pro. The process left the old system in a folder called Windows.old. Since I need nothing from the old system, I wanted to delete the Windows.old folder. When I try to, i get the message, "You need permission to perform this action. You require permission from <computer_name>\Administrator to make changes to this folder." I've tried adjusting UAC (which should have nothing to do with it. I've tried the "net user administrator /active:yes" command line method (even though I am the local administrator). And, I've tried taking ownership of the folder. Nothing has worked. Is there anything else I can try?