In July 2010, several players who successfully used information leaked from Valve to increase their chances of finding a rare "Team Fortress 2" weapon called the Golden Wrench were banned by VAC. During the same month, approximately 12,000 owners of " "were banned when Steam updated a DLL file on-disk after it had been loaded into memory by the game, causing a false positive detection. These bans were revoked and those affected received a free copy of "Left 4 Dead 2" or an extra copy to send as a gift.