Hi
Try an app called Take Ownership.
Link Removed
If that doesn't do it try this...
How to Enable the Administrator Account
Open the command prompt with elevated privileges by clicking the Start orb, All Programs, Accessories, right-click Command Prompt and then select Run as administrator.
Type
net user administrator /active:yes
and then press Enter.
Log out and log back in as Administrator.
When you are done undue the process by doing the same thing and pasting in
net user administrator /active:no
The security stuff in Windows 7 is a pain in the ****!
I still haven't been able to get it to let me run Norton Ghost from inside Windows, it keeps saying (You don't have sufficient privileges...