Quote: Originally Posted by logicearth
Formatting the HDD before installation is not required to get a "clean" installation. The previous installation wont be interfering with the new installation like an upgrade would. It only takes additional HDD space.
I agree. I know the registry is clean after a normal custom install. If that is not enough to be a clean install, maybe some standard could be stated to see if it is actually done or not.
Beside the Windows.old file, there are a few hidden system files that are almost as large as the windows.old file. They start with $Windows and can be seen if you set the folder view to see such files.