In another forum ( http://www.eightforums.com/general-support/62939-drop-performance-mouse-stuttering-after-about-20-min-3.html ) various people confirm that stopping Intel(r) Technology Access Service in Task Manager does seem to fix the mouse and sound problem:
- Ctrl-Alt-Del to load Task Manager
- Scroll down and look under Background Processes to find 'Intel(r) Technology Access Service'
- Right click and choose 'End Task'
You might want to try that.
I think but I don't know that one of the recent updates is the real culprit.
Cheers,
J