2 years ago, I had the unfortunate experience of getting a motherboard based on the VIA KT133a chipset. In Windows 2000 or XP, I had nothing but problems. I experienced IDE corruption, machine rebooting when copying large files from one IDE channel to another, halts/lockups when CD burning and AGP issues. I tried the latest VIA drivers and Microsoft VIA drivers.
Finally, after 6 months of issues, what solved ALL of my issues was a patch called “VIA PCI latency patch” by George Breese.
I recommend anyone using a VIA KT133a chipset to check out this URL.
Note: I have a Liteon 411s DVD burner connected to my main rig which is an nforce2 motherboard. My VIA KT133a chipset motherboard is a dedicate Linux server so I don’t use it with Windows or burning anymore.