23 Jul 11, 10:42PM
By a bizarre coincidence, this happened to me yesterday. I tried everything to fix it, short of restarting the computer. Finally today it twigged what was different; my eldest son had logged in to his account on the PC too, and had then switched to my account, leaving his logged in. The extra user was draining the resources, not enough to notice in anything else, but enough to kill the FPS.
I realise it's unlikely your computer has been running all this time, or that you have another account logged in, but I suggest looking carefully at other running processes and checking for malware.
I realise it's unlikely your computer has been running all this time, or that you have another account logged in, but I suggest looking carefully at other running processes and checking for malware.