Hello, and welcome!
There certainly looks to be a hardware issue on there still, there are many of these errors in your System log...
Code:
Event[50]
Log Name: System
Source: Microsoft-Windows-WHEA-Logger
Date: 2023-08-14T19:42:50.8640000Z
Event ID: 18
Task: N/A
Level: Error
Opcode: Info
Keyword: N/A
User: S-1-5-19
User Name: NT AUTHORITY\LOCAL SERVICE
Computer: Umbreon
Description:
A fatal hardware error has occurred.
Reported by component: Processor Core
Error Source: Machine Check Exception
Error Type: Unknown Error
Processor APIC ID: 0
The details view of this entry contains further information.
The 'reported by processor core' doesn't automatically mean that you have a CPU issue, the key words there are 'reported by'. The dumps also strongly indicate a hardware issue too, and I think it's most likely to be RAM related. I say that because two of your dumps fail when manipulating PTEs (page table entries), one is for a stack pointer error, and one is for a file system cache manager failure. The common denominator there is RAM.
There is an outlier in one of the dumps however. This one points to the wireguard.sys driver as being at fault. Is that part of the WireGuard VPN, or some other networking product? The version of this driver is old, dating from 2021...
Code:
3: kd> lmvm wireguard
Browse full module list
start end module name
fffff806`a2ee0000 fffff806`a2f7a000 wireguard T (no symbols)
Loaded symbol image file: wireguard.sys
Image path: \SystemRoot\System32\drivers\wireguard.sys
Image name: wireguard.sys
Browse all global symbols functions data
Timestamp: Tue Oct 12 19:09:12 2021 (6165B328)
CheckSum: 0007DA65
ImageSize: 0009A000
Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4
Information from resource tables:
For testing purposes, and since you do seem to have a hardware issue, it might be wise to disable or uninstall this product. We can return to this potential problem once we've fixed the hardware problem you seem to have.
To test your RAM I'd suggest you download
Memtest86 (free), use the imageUSB.exe tool extracted from the download to make a bootable USB drive containing Memtest86 (1GB is plenty big enough), and then boot that USB drive. Memtest86 will start running as soon as it boots, if no errors are reported after the four iterations of the 13 different tests that the free version does, please restart Memtest86 and do another four iterations.
Let's see how that goes before we look elsewhere.
