I installed RTM (x86), and did a "fresh install". When setup was done, I went to delete Windows.old and Windows.000. Windows.000 deleted OK. Windows.old ( which has /Windows and /Program Files directories in it ) won't delete. The OS keeps telling me I need "Trusted Installer" permission to do that. BIG problem...since there's about 8 GB (almost 50,000 files ) clogging up the hard drive. I tried changing the permissions on the directories (they are read-only) but the system won't let me. I tried formatting the drive from another installation, but it refuses to format the partition. Apparently, I'm stuck in a limbo in which I am left powerless. Why can't setup accept the instruction to do a clean install without saving a bunch of old garbage to windows.old ? Why isn't that option (clean install, full-format and don't save anything) available to the user when setup runs ? What do I have to do to recover the 8GB space which I have lost ?