It's definitely heat related. Some combo of hardware with display software or drivers that's incompatible just makes it all go beserk.
Mine has had a problem since day one (over 1 year and a half) but as I don't live anywhere near a Microsoft Store, I'm stuck with this piece of junk.
I've written on every thread possible but MS doesn't seem to care (has a mod post a 'we're looking into it, have you tried troubleshooting?' bs post every now and then just to keep appearances but that's about it)
I've called and chatted with so many MS useless techs
I've had a MS guy remotely try to fix it
Done all the trouble shooting known to man a million times
Un-installed windows and re-installed, same with updates
Reset PC about 15 times
Tried all fixes possible posted in every thread and nada
I used to be able to stop it if I moved cursor or opened the task bar but after one of the updates, the problem became worse, meaning that nothing stops the shaking anymore other than letting it cool down and then I have like 30 minutes before the flickering
hell starts again.
Only time it stopped for a few months was when I reset-pc and stopped ALL updates by setting it as metered connection and that kept me flicker free, but then I used it somewhere else on some other wifi and forgot and it updated and flickering came back and
nothing i do helps.
I have disabled all the functions that I can of the Windows Defender (I noticed that's one of the things that made it overheat like crazy but you cant disable it completely sadly) and that gives me a bit more time before the flicker starts after I turn it
on, but it only lasts for so long.
Honestly, I've resigned myself to never buying MS again, that it was 2k$ thrown to trash, and all we can do is warn EVERYBODY everywhere to never buy from them again. I'm slowly saving to buy another laptop (this is the only one I have of anything) and for
now I'm stuck with this thing which I use for work as I am a freelancer (and soon to have eye problems from this shaky piece of cr*p)...and can't do anything to fix it.
Microsoft is a disgrace.