Hi guys. I'm using a MousePen 8x6 tablet. I figured the running background driver affects my laptop's performance especially when I'm playing games. That particular day I was playing PES 2010 and it suddenly lagged after updating a few drivers here and there. I launched the Task Manager to see what's eating the power turns out a WTClient.exe (description: Tablet Client Driver) uses up to 5% when I play PES 2010. I'm not so sure if it's applicable to other games. So I end tasked the process and my game was running smoothly again. Hope this will be useful to some 
i hope there are more that i can share in future!