strange error

I keep getting the following error message when i play some games(NWN, CS): “driver component sizes mis-match. retry to keep going. cancel to exit.”

does anybody know how to fix this problem?
my specs…

AMD Athlon™ XP 1800+

System BIOS : Award Software International, Inc. 6.00 PG
System Chipset : VIA Technologies Inc VT8366/A,VT8367 Apollo KT266/A,KT333 CPU to PCI Bridge
Front Side Bus Speed : 2x 134MHz (268MHz data rate)
Installed Memory : 512MB DDR-SDRAM
Memory Bus Speed : 2x 134MHz (268MHz data rate)

Adapter : NVIDIA GeForce3 Ti 200 (detonator 44.03)

Device : VIA AC’97 Enhanced Audio Controller (WDM)

Operating System(s)
Windows System : Microsoft Windows XP Professional Ver 5.01.2600 Service Pack 1