I have a customer that is having a problem with Microsoft Word and Excel.. It may be happening a little in other applications, but not quite as frequently, the problem is an error the user didn't write down.. At any rate, the error says that WINWORD.EXE performed an illegal operation in module 014f:xxxxxxxx.. The xxx's represent the only part of the error the user can't remember.. I have replaced the motherboard and the memory in this machine and it works for like 3 weeks and then starts happening again.. REALLY STRANGE! Any help is appreciated..

Chris