Bugcheck C4, generates solely due to Driver Verifier.
We have got our intention why we enabled that verifier, now you may disable driver verifier, there will be no more C4 at boot.
So, it is PxH1pa64.sys
but what is this driver
No information on it I am getting. I am seeking for more help, if anybody else know anything about it, but precaution is first.
Download MBAM Free
, install it and update it. When done, boot your computer in Safe Mode
, do a full system scan with it. It might be something malicious, so let us be preventive at the first chance.