Originally Posted by Matt Finley
Bass Thumper’s post about dust is good. And his question about whether your computer is a laptop reminds me, have you checked the Power Settings in Control Panel? If you recently had a windows update, double check that your CPU is still at 100%. Also a windows update can reactivate devices that should be disabled, like the HD audio driver for your monitor.

I am running on a desktop. As far as I can tell it is not dirty.

I don't know what you mean by this:
"checked the Power Settings in Control Panel?....double check that your CPU is still at 100%"

I don't find anything that show CPU % in Power Settings.

And how do you know if "the HD audio driver for your monitor" has been reactivated? What would I look for?