I am having a rather random and very annoying issue. After my system is running for a some time (appears to happen randomly), it acts as if some keys on the keyboard are being held down. Specifically the left and right keys, sometimes backspace, maybe more?
I can't figure out what could cause it. The system has been working without problems for a number of months now. This just happened recently. When I unplug the USB keyboard, the problem still persists. I have run MS Security essentials and AVG free with out any problems found.
I have found if I end the largest SVCHost.exe, the problem stops for a little bit. The problem does not appear in safe mode, from what I've found. A restart will fix the problem, until it happens again.
When I run a script recorder to see which keys are being pressed, it is rather rapid, looks like someone is mashing the numpad like hitting 116 116 116 116 116 over and over along with some other keys.
Any ideas would be greatly appreciated. Thanks in advance!
EDIT: After doing some problem solving, I have found when I stop the service "hidserv" (Human Interface Device Access) the problem stops. This runs within the svchost.exe I mentioned early. Why is it giving me trouble?
Try http://www.prevx.com/ - Some false positives with some benchmarking software I was using.
After checking for rootkits,
Disconnect all devices from the computer except mouse, keyboard, network and monitor.
Does problem still happen?
If yes, disconnect network.
try a different keyboard. See if the problems still occur.
You might also try this
1. Disconnect USB keyboard
2. Uninstall keboard drivers from Device manager
3. Plug keyboard back in
4. Should autodetect and install or scan for new hardware.
That would be the culprit most likely. The "ghosting" could be caused by the mouse as well. I'm going to hazard a guess that you have a Logitech gaming mouse? I must now perform a face palm as I should of snapped that everything else was already unplugged.
It's entirely possible. I say it's possible because of a similar experience with a friend and his MX518. I had forgotten that episode because I was firmly convinced at the time it could never be the mouse and that was exactly what it was. Swap out the mouse and see if it solves the problem. Good luck.
Update: I completely pulled out the motherboard, disconnected everything from it, and for the hell of it, reapplied thermal paste on the south bridge chip set. I figured why not.
I did notice that one of the USB motherboard connectors (for some of the case USB functionality, normally connected to motherboard header) had a yellow wire that has gotten lose. When I put the system back together, I left this unplugged. Could this be the culprit? Possibly the connecting going in and out was messing with the south bridge?