Ahh.. didn't realise you were playing two different games on the same machine - in that case, shouldn't be a bad ram problem. This might be a long shot, but you could try copying the *.ldw files from the game directory to a temp directory, then deleting them from the game directory and copying them back from the temp directory to the game directory (thinking of a possible bad cluster on the drive in this case). Otherwise, check the ldwlog.txt file in the game directory and see if there's any indication there of what might be happening