BSOD at random, also PC locking up for 5-10 seconds. error 0x00000101

Not 5 minutes after posting my last update, I got a BSOD with STOP 0101xxxxxxx error.
Direct3D (not DirectDraw - doh!) needed for BF3, which is about the only thing I was playing game-wise.

The Nvidia update put on 320.49WHQL, but seems to be the same issue as happening with previous versions. Even playing some of the games on FaceBook (yeah, I know) would get the game freezing, then carrying on aswell and sometimes getting a Flash or Shockwave error that I could continue through.

Will try again, but last time I couldn't even boot to desktop or safe mode hence no dumps

Ah - sorry! Excuse the noob

When it did BSOD on reboot (I've since done a system restore to get the PC operational), I managed to take a pic before it rebooted.

"The IO manager has detected a violation by a driver that is being verified......
*** STOP: 0x00000C9
*** HIDCLASS.SYS - Address FFFFF8800601B710 base at FFFFF88006019"

Latest dumps......

Here's something weird though....

I have an account that my children use for themselves, and they don't seem to have any issues at all. Admitted that they are only playing online games in Firefox, but they don't/haven't suffered any of the issues that I have - no lock ups etc...

So, does that mean that the issue is within the software and my hardware could be OK?

Well, a full clean install onto a brand new HDD didn't work well either....... still getting BSOD, and same STOP code

Must be hardware..