I have been getting an odd error occasionally and have also noticed that my mouse movements are not smooth as well as sometimes just die on me but quickly come back. I just got the error message again and took a screen shot of it also going to post that now and see if someone knows anything about it.

http://img261.imageshack.us/img261/2761/mouseerroryk8.jpg

From a Google Search:

You may receive a "MEM_BAD_POINTER" error message on a computer that is running Windows XP with Service Pack 2:
http://support.microsoft.com/kb/910466

Looks like an easy fix!

Thanks I did get it fixed but it was a different method i downloaded the newest drivers fro my logitech MX-310 Optical mouse. Thanks though for the info.

Thanks for the update.