I am currently using the Via 4.37a on my Windows XP system without any hiccups (touch wood!). I am not sure whether the new drivers were the contributing factor but I did notice that my memory benchmarks went up quite a bit after I installed it. Previously, after much tweaking, I could achieve 848/916 on the Sandra Sisoft 2001 memory benchmark. On the same memory setting in the bios, I now get 862/945. Hmm..