I am one of those people who think that Mac users are a slight bit retarded.
Well, bobby. Try these things, perhaps these will help!
- AMD 64 Dual Core's are known for hyperthreading getting screwy. Google "AMD dual core optimizer" it makes ur dual core more stable.
- If neither of these work, download "nTune" or any graphic card temperature monitor and see if that is fine. If not, bust ur computer open and clean every fan. If graphic card fan is clogged, chances are so are the others.
btw, do not change the compatibility. Combat Arms work on Vista 64 as is, very stable. The problem seems either your graphic card, or seeing that u are using a dual core AMD 64 procs which are already known to have these problems... i suggest the AMD dual-core optimizer. Also get the latest graphic card driver.