I have inadvertently managed to remove all permissions to my C: drive so now its become read only and is obviously causing numerous problems.

I have tried booting in safe mode with command prompt and using the hidden Administrator account but whenever I try commands such as takeown and icacls all I get is 'Access denied' so I'm now at a loss as to how to reset the permissions so I can regain control.

..any help/ideas much appreciated before I format and do a clean Vista install!!



Quick update - I've now resolved this by removing the offending drive, inserting it into a USB caddy, then on a Windows 7 laptop, I managed to take ownership and then set the owner to SYSTEM and I now have full access once more!!

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