A set of Via drivers are built in. I have not looked at the driver numbers but I belive they are very recent builds. let me look now.
Ok Via CPU to AGP Controller is showing a date of 7/1/2001 and the publisher is showing as Microsoft. The other are showing the same date and publisher. This concerns me a little since it does not show the publisher as Via. BUT, the system is rock solid and I'm getting 5 to 10 % increase in FPS with win XP in AH and OFP.
IN closing, There are 4 in 1 drivers that XP installs THAT CAME WITH WIN XP ( I HAVE FULL PRO VERSION. DID INSTALL ON A CLEAN HD) Who the publisher is I can't say for sure. Should you upgrade to what ever the newest Via 4 in 1's are? Well my advice to my customers in my shop is " if it ain't broke , don't fix it". My personal moto is " tinker till you really screw it up then reinstall" It's up to you.
Vati