try this  Remove Windows.old: 1. Click Start2. Select All Programs3. Select Accessories4. Click System Tools5. Pick Disc Cleanup6. Select Files from all users on this computer7. Confirm the UAC8. Select the drive that contains your old installation9. One of the options will be to delete your old installation. Select it and let the Disc Cleanup Utility do its thing.
I need to delete the windows.old folder from my re-installed versions of Vista Home basic,  but I get a "Destination Acess Folder Denied" message preventing this.  I need the hard drive space!  I am the only user of the computer, so I have administrative access.
Can't delete "windows.old"