That's some solid rig for its time for sure. By the way, is there any reason for you to run two AV's at the same time? Or is one of the just a firewall?
Alright, let's start by checking if Windows stuff is in place.
Open an administrator command prompt (search cmd->right click->run as administrator) and type each code one at a time, note and reply the last messages on each:
sfc /scannow
dism /online /cleanup-image /checkhealth
dism /online /cleanup-image /scanhealth
dism /online /cleanup-image /restorehealth
sfc /scannow
-----------------------------------------------------------
Hi, again apologies for the time taken. In between fighting this dying unit and trying to find work there's not a lot of time left... so I very much appreciate your help.
Here are the readouts from the four cmd instructions run;
sfc / scannow
Microsoft Windows [Version 10.0.19042.630]
(c) 2020 Microsoft Corporation. All rights reserved.
C:\WINDOWS\system32>sfc /scannow
Beginning system scan. This process will take some time.
Beginning verification phase of system scan.
Verification 100% complete.
Windows Resource Protection found corrupt files and successfully repaired them.
For online repairs, details are included in the CBS log file located at
windir\Logs\CBS\CBS.log. For example C:\Windows\Logs\CBS\CBS.log. For offline
repairs, details are included in the log file provided by the /OFFLOGFILE flag.
C:\WINDOWS\system32>
-----------
dism /online /cleanup-image /checkhealth
Microsoft Windows [Version 10.0.19042.630]
(c) 2020 Microsoft Corporation. All rights reserved.
C:\WINDOWS\system32>dism /online /cleanup-image /checkhealth
Deployment Image Servicing and Management tool
Version: 10.0.19041.572
Image Version: 10.0.19042.630
No component store corruption detected.
The operation completed successfully.
C:\WINDOWS\system32>
-----------
dism /online /cleanup-image /scanhealth
Microsoft Windows [Version 10.0.19042.630]
(c) 2020 Microsoft Corporation. All rights reserved.
C:\WINDOWS\system32>dism /online /cleanup-image /scanhealth
Deployment Image Servicing and Management tool
Version: 10.0.19041.572
Image Version: 10.0.19042.630
[==========================100.0%==========================] No component store corruption detected.
The operation completed successfully.
C:\WINDOWS\system32>
-----------
dism /online /cleanup-image /restorehealth
Microsoft Windows [Version 10.0.19042.630]
(c) 2020 Microsoft Corporation. All rights reserved.
C:\WINDOWS\system32>dism /online /cleanup-image /restorehealth
Deployment Image Servicing and Management tool
Version: 10.0.19041.572
Image Version: 10.0.19042.630
[==========================100.0%==========================] The restore operation completed successfully.
The operation completed successfully.
C:\WINDOWS\system32>
-----------
sfc /scannow
Microsoft Windows [Version 10.0.19042.630]
(c) 2020 Microsoft Corporation. All rights reserved.
C:\WINDOWS\system32>sfc /scannow
Beginning system scan. This process will take some time.
Beginning verification phase of system scan.
Verification 100% complete.
Windows Resource Protection did not find any integrity violations.
C:\WINDOWS\system32>
Now - here's a possible positive light.
Today took me 2 hours to get a desktop screen, and then it froze. I re-booted and it came up with "scanning and repairing "F" drive, so I let it. It booted then froze.
I lifted the lids and took out the SCSI interface card that my RAID 0 used as a video editing drive.
Booted - it runs sweet, fast and stable.
So - is it the SCSI card, drivers or one of the four 500GB spinny drives attached to the SCSI card failing - (but that would have caused a drive drop out - not system crash - surely).
Checked today again and there are no windows updates available to me.
Thanks again for the help.