Delete File And Folders UAC Messages "administrator Rights"

I restored my vista OS using a system image utility provided by Alienware. It created a backup folder on the c drive with all the old files in it, including user profiles. I changed the owner of all files and folders back to my account and tried to delete it, but got the UAC messages that I need to allow administrator rights to do so. After clicking yes, I got a message that permission was denied with the only options of "Try Again" or "Cancel". After making visible all hidden files and folders, I was able to drill down to the one file I could not delete. I've used the "take ownership" steps in Vista explorer properties, and also the "takeown" dos commands, which report success that the Administrators group or my account which belongs to the administrators group, is the owner of the file, and that I have full control of it. Even so, I cannot delete this file. In DOS, I get access denied. In Explorer, I get the "you need permission to perform this action" message, with "try again" or "cancel", and it shows that my account (or administrators group, doing it that way) is the owner. It's just this one file. I was able to delete all other files and folders around this file, but just not this one.

I wonder if the folder path is so long or so nested that UAC fails to figure it out? It was in users\appdata
oamingetc. Or is the file corrupt? The file is a tempory file created by one of those biometric devices when logged on with your fingerprint, and is supposed to disappear when you log off, but it seems to have remained there because of a hard boot. Is there a utility I can use that can nuke this one lone file?