I want to believe this is true, maybe Ubuntu in dual boot will show more info on RAM and SSD.

There's nothing much to show here, this is common on most drives. SSDs that are 1tb tend to round off at the 960gb mark for a variety of reasons, and the remaining space is probably Windows installing 4 or 5 versions of Candy Crush for you. Like the other comment said, your iGPU also needs memory for a framebuffer and some basic windowing capabilities, which should take up around a gig on most modern systems.

Your reaction to this is off-base, and wishing ill on anyone for a rash misconception is a bad habit to get into. Roll with it, if you need more storage then upgrade to a 1920gb (2tb in Big Box stores) SSD instead.

WIndows shows 930GB total SSD capacity, with 35GB used by Windows. But the remaining free space seems sufficient for at least the 2 years of warranty.

I am worried a bit that even under rather small load like opening folders and checking sound/video palyback, the vent grid on the bottom of this new E14 (which doesn't have a vent grid in the side) gets rather warm, so I need to constantly use the external cooling pad.

P.S. Ok, my reaction to this is 95% off-base and a bad habit to get into, but the implicit on-site idiotic circus that led me to buying from this vendor may overweigh by the remaining 5%, so a deeper awareness can also benefit to everyone.

If you want to return the laptop, return it. Absolutely nothing you've mentioned so far indicates a hardware failure or warranty-covered replacement.

Basically I do not want to return it. I knew it will have 8GB of soldered RAM, but I found this article [1], which explained some benefits of soldered RAM. And elswhere on some gaming forum it was mentioned that if soldered RAM is faulty, it will be evident in he first month of usage. I'd like to install Ubuntu in dual boot with Windows as soon as possible, but in recommendations on testing new laptops there is a memory test. If it still worked fine (no blue screens etc), should I run the memory test to test the soldered RAM or the soldered RAM functionality will be more evident under some "natural" loads like 3d modelling software and compute intensive/parallel tasks?

[1] https://www.makeuseof.com/why-laptop-parts-soldered-instead-...

I'm worried that in the attached sparse documentation it is mentioned that customer serviceable units are only as power adapter, base cover assembly, memory module, memory module bracket, solid state drive and power cord. Isn't battery sort of not user replaceable?