Hello,
I bought my TravelMate back at the end of 2017 and it has been working excellent EXCEPT one minor thing - an occasional, but regular blue screens of death.
The most common Blue Screen of Death code I get is this:
Problem Event Name: BlueScreen
Code: 1a
Parameter 1: 41790
Parameter 2: ffff8d0003000000
Parameter 3: 0
Parameter 4: 1
OS version: 10_0_18363
Service Pack: 0_0
Product: 256_1
OS Version: 10.0.18363.2.0.0.256.48
Locale ID: 1033
Much less often I get this:
Problem Event Name: BlueScreen
Code: 12b
Parameter 1: ffffffffc00002c4
Parameter 2: 5af
Parameter 3: 2381853b620
Parameter 4: ffffdd00e5b33000
OS version: 10_0_18363
Service Pack: 0_0
Product: 256_1
OS Version: 10.0.18363.2.0.0.256.48
Locale ID: 1033
My OS setup is this:


Some more additional details about the circumstances of the error:
1) It seems to have started with one or more of the following events:
1a) the upgrade of BIOS from 1.11 to 1.12 after the revelations of Meltdown and Specter vulnerabilities
1b) the repartitioning of the hard drive done for installing Linux Ubuntu, which also necessitated the change of boot method (from UEFI to Legacy)
Under Linux, my laptop still rebooted randomly but displayed no error messages. After some time, I reverted back to Windows 10. I created a fresh install and for a long while everything worked fine. Then it started again but I figured it might be because of Adobe Acrobat that I had installed, and after uninstalling it all came back to normal again.
I even sent the laptop to be serviced but it came back with a note that they were not able to identify anything wrong with it, probably because of the randomness of the error.
I ran Windows Memory Test, sfc and chkdsk from Windows PowerShell. I don't know how to check logs of the latter two, and the Memory Test for some reason does not return any logs in Windows Event Logs - there is only information that it was scheduled, with no results. I believe I even once ran memtest86+ but it was a while ago and I don't remember the results. My system and drivers are up to date.
As of now, the error happens either after I close the lid and I learn about it when I open it back again; or shortly after opening the lid; or randomly while using the laptop.
My reliability history graph looks like this (BSOD marked):

My full reliability history in XML file:
https://www.dropbox.com/s/4ggeqv1sa4p9tzw/reliability-history.XML?dl=0Can you please direct me on what I could do to identify and eliminate the culprit of this error?