Solved Possible Windows Focus error

I've been having an issue the past few days with open and selected windows deselecting and immediately re-selecting as if another program is taking the focus.

I've run different scans to check for viruses, rootkits, etc. with nothing found. I ran an sfc /scannow that came back fine. I checked the registry key for the focus and it is unchanged. Also, I checked for any program running in the background that could've done it, but turning those off didn't fix the problem.

I'm not sure if this is important or not, but a few days ago I started having the dreaded BSOD with an error from iastoreA.dll. At that time sfc /scannow couldn't fix the issue, so I refreshed Windows 8, reloaded 8.1 and haven't had that problem since.

Any suggestions would be greatly appreciated.

Go to Control Panel\All Control Panel Items\Ease of Access Center\Make the computer easier to see and make sure "Activate a window by hovering" is unticked :

This is the only thing I can think of.

Thanks for your reply. I ended up replacing the HDD and doing a clean install of 8 and 8.1, and that fixed a bunch of little issues that I'd gotten so used to I didn't even notice them. I do have one issue that's unrelated to focus, so I'll start a new thread for it.