Hello,Hawkfish. This could be a hardware problem, or possibly...?. I would disconnect keyboard and mouse , and then reconnect, see what happens.
Might be a virus?? do you have up to date protection???. If so , you can also run a free online scan, just disable your current antivirus. Sometimes things will be found with one, that was missed with another. Free scan>>>
http://www.trendmicro.com/en/home/us/enterprise.htm Next and most important, run a hijackthis scan and post it back here. Download to its own folder--do not run from desktop. Run the scan and click save-log, copy and paste back to this site. DO NOT FIX ANYTHING, that will come later. Hijackthis link>>>
http://www.spywareinfo.com/~merijn/downloads.htmlLets see if its a malware/virus problem, or software/hardware.
I have a couple of other programs that can remove Aware/spyware {free] , but lets see what is really happening. A description of your system, anti-virus situation would be helpful.