if you did hack, would you really be dumb enough that after you've read what UAC does, still keep cheats on your pc while playing with it? I doubt. Just sayin', any smart person would first delete any track of cheats on their pc when they're trying to prove their innocence.
or in short: you can't really prove anything.. if you did cheat you could of deleted cheats by now easily. Then you can redownload them after you've passed ''UAC'' test - also uac isn't 100% anticheat, ask some people in WM that know a lot about scripts.