Hi. . .
You probably saw "win32k.sys" - the win32 subsystem driver. It is a Microsoft driver and is considered sacrosanct; therefore it is not the cause of your BSODs.
Seeing bugcheck 0x109 - Critical Structure Corruption - means that something was attempting to corrupt the kernel. A microsecond of failing RAM or some other hardware failure that caused RAM to become unable to properly hold kernel code would do it. That other hardware piece that momentarily failed could be just about anything.
Kernel memory dumps are typically used by developers to debug software. They are of no use in figuring out hardware issues.
Some hardware diagnostic tests:
The problem may also be with other hardware parts such as the motherboard or PSU for which there are no software tests.
Sorry that I couldn't be more help to you.
Regards. . .
p.s. I'm sure that you ran Driver Verifier just fine. It's job is to stress test drivers and if a driver fails a test/check, Driver Verifier forces a BSOD. Since no BSOD occurred under Verifier, your 3rd party drivers passed the tests.
This is another indicator that you are dealing with UNKNOWN failing hardware.