[wilty]

I recently updated to windows 7 pro from vista home premium. My laptop has two hard drives, C (w/ 30 gb and D (w/ 180 gb). Vista came on my C drive but I installed 7 on my D drive because it had more space. Now though my C drive still contains the Windows folder from Vista and it's taking up 20 gbs while the new Windows folder for 7 is only using 7 gb on D. I already deleted the windows.old file that came from the 7 installation but whenever I try to delete the Vista Windows folder on C I get a message saying I need permission from trustedinstaller.
How can I get rid of the vista files because they are taking up way too much space?

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You should try 'formatting' the drive instead of trying to just delete a folder on it.
Start Windows 7, right-click drive 'C' and choose 'Format' from the context-menu.

If you still get a permissions error, try logging on as Administrator.

Important: Formatting will erase all data on the drive, so if there are any files on it you want to keep, copy them to your Windows 7 drive first! (and preferably to another backup medium as well, just for good measure).

[phillipcorcoran]

You should try 'formatting' the drive instead of trying to just delete a folder on it.
Start Windows 7, right-click drive 'C' and choose 'Format' from the context-menu.

If you still get a permissions error, try logging on as Administrator.

Important: Formatting will erase all data on the drive, so if there are any files on it you want to keep, copy them to your Windows 7 drive first! (and preferably to another backup medium as well, just for good measure).