Delete: Access Denied
TakeOwn.exe /f filename.exe : Access Denied
Attrib.exe -s -h : Access Denied
fileacl /force
cacls.exe : Access Denied (even whe trying to display the current owner)
Rename: File not found (its hidden)
Re-boot in to safe mode and tried the above: Access Denied
Running the above commands as Local System: Access Denied
Tizer Unlocker: Fail (Doesn't find anything locking the file)
File Assasin: Crashes ("FindRemoteFileHandles returned NULL value.")
CHKDSK /f on the drive
Useful software:
http://lockhunter.com/
Ref: http://superuser.com/questions/129995/access-denied-using-takeown-exe