I've recently reinstalled Windows 7, and all the files on the backup hard disk I use are exclusively set to ownership on my previous admin account. How this occurred, I have no idea, but now I can't access my own files. Using my new admin account, I set the ownership to the new account and then set myself to full permissions. But when I changed the settings on a folder, some of the contents recursively updated but others did not- I have to change every one of these files and folders manually, of which there are a great many. I tried setting myself to act as part of the operating system in the Local Security Policy, but again, this has only worked to grant access to some of the files. There are still many more that I can't access.
I need to wipe all trace of the previous administrator account from all files and folders on the hard drive and grant myself all permissions.
Any suggestions as to how I can eliminate this problem?