ubuysa
The BSOD Doctor
I've spent the morning going a bit deeper into your recent dump and the failing driver is definitely the graphics driver (nvlddmkm.sys - the Nvidia graphics driver). There is one point in the stack trace where an element of the driver fails to load...
...so this dump is certainly a failure of the NVidia driver or the graphics card itself.
I looked back at the other two dumps as well and did a deeper analysis of those as well. Neither are as conclusive as this one but the KERNEL_SECURITY_CHECK_FAILURE dump has entries from HAL - the Hardware Abstraction Layer, which is the interface between Windows and the hardware - immediately prior to the bug check. That also makes me think you may have a graphics card issue rather than a driver issue.
I think even more now that it's time to call PCS. You can try asking them to swap the graphics card since that seems the most likely cause, it would be cheaper and easier for you and PCS to swap the card rather you have to RMA it. They can only say no.
Code:
fffff882`19bae3f8 fffff802`171f7709 Unable to load image \SystemRoot\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_edab19158bdd0d0a\nvlddmkm.sys, Win32 error 0n2
nvlddmkm+0x207709
...so this dump is certainly a failure of the NVidia driver or the graphics card itself.
I looked back at the other two dumps as well and did a deeper analysis of those as well. Neither are as conclusive as this one but the KERNEL_SECURITY_CHECK_FAILURE dump has entries from HAL - the Hardware Abstraction Layer, which is the interface between Windows and the hardware - immediately prior to the bug check. That also makes me think you may have a graphics card issue rather than a driver issue.
I think even more now that it's time to call PCS. You can try asking them to swap the graphics card since that seems the most likely cause, it would be cheaper and easier for you and PCS to swap the card rather you have to RMA it. They can only say no.