After removing malware computer crashed once and mouse hang several times

NVIDIA GeForce GTX 460 with driver version 9.18.13.3182. But I'm pretty sure all or at least part of the problem is Firefox because I stopped using it and everything's ok.
 
Have you tried removing FireFox. With a third party software . Such as Revo. Then reinstalling it. To see if maybe this fixes the problem.
 
I found after disabling hardware acceleration in Firefox everything was fine. According to here hardware acceleration isn't compatible with some video card drivers so maybe after the update this caused it. What is hardware acceleration and how can having it enabled in one program cause the entire system to freeze and lag and screw up.
 
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