PLEASE HELP ME!~!!

Ok, so i was exporting a movie in premiere, but didnt realize i had codec set to none.. my hard drive had at least 125gb free when i started.. i left it running overnight, and when i woke up i had an error message in premiere saying "DISK FULL".. so i checked, and im now down to like 500mb.. but heres the kicker... NO FILE TO DELETE to give me back my space.. ive tried doing numerous searches with hidden files showing, ive tried windows washer to clear whatever i could. but its still only showing 500mb free... i restarted, shutdown rebooted...im thinking its a swap file or something but cant find anything.. i really need to get this space back.. any ideas? thanks in advance..