Windows 7 - Deleting protected folders/files

Hello.

Recently I had a major system crash of pretty much unknown origin, anyway I had to reinstall my Windows 7. I've got two hdd's and being afraid the one I used for system is somehow corrupted I first installed Win 7 on the other drive. Then I decided to install it on the first drive. Now all is fine but I just wish to delete windows files from the other hdd and there is literally no way of doing it
I tried:
- changed owner permission to my user name for all actions
- deleting via command line
- deleting in safe mode

I can't unselect read-only as it says: "you will need to provide administrator permission to change these attributes", I select continue and get "An error occurred applying attributes to the file xxx" Access is denied.

When I simply want to delete it I get: "You need permission to perform this action. You require permission from (MY USER NAME) to make changes to this folder".

It is liked Windows wants permission from the same user which is logged in. Anyway, I don't have any other user accounts!

Please help!

Have you tried formatting the corrupted drive?

Well, thank you but I have quite a lot of data there

SystemRescueCd

or

Trinity Rescue Kit | CPR for your computer