Random BSOD

I have been having BSOD for the past few months. I have tried the following:-

Reinstalled graphics Card.
Reinstalled Windows on a different drive
Scanned memory with Memtest several times. Negative results
Removed Avast antivirus and installed bit defender.

I'm stuck and am hoping that its something simple to rectify. Can someone give me some pointers as to what to try next?

I have attached the dump files as instructed. Attachment 369554
If someone could have a look at these to see if there are any clues I would appreciate it.

Thankyou..

I haven't had one since the post but I seem to have one very 2-4 weeks, the last five all caused by driver ntoskrnl.exe and address ntoskrnl.exe+748c0. This is according to a bit of software I have installed called Bluescreenview.
Different bug check string (whatever that might be)

Different bug check strings alternating between the following - "IRQL_NOT_LESS_OR_EQUAL")
or ("MEMORY_MANAGEMENT).

With the exception of the first BSOD I recorded being due to the NTFS file system.

Thanks


Warren