Windows 10/1709 Version - FPS drops and stutters

Here is the problem I have been having for last 4 months:
After I bought my new Acer Swift315-51G in October, 2017 everything was running fine. So I'd decided to buy 2 games: Starcraft 2 and Guild Wars 2(both expansions). A couple of months gaming without any problems. Until the middle of January:
I have started getting FPS drops in both games or the so called stutters - from 60 down to 12 for 1-2 seconds, each 10 seconds. I tried other games aswell, same thing. It doesn't get fixed by lowering the graphics, so it has nothing to do with the game requirements. Still here are my PC specifications:
Intel® Core™ i7-7500U
RAM: 16 GB
NVIDIA MX150
To check whether I wasn't going mad, I downloaded even an old MMORPG from 2004 with the following requirements:

CPU		PentiumIII 1.2GHz
RAM		1GB
Video Card		256MB

Same story, I still get the stutters. The only thing that I can play right now on this computer are mobile games with the help of an emulator.
Here are the things that I have tried:
Complete Re-install of Windows
Uninstall/Install Drivers completely
Disable GameBar (even with the regedit)
Lower Graphics to minimum (not a change in the FPS drops, even worse)
Update to newest drivers everything
Set settings to higher performance (NVIDIA,Intel)
Contacted Microsoft Support more than 10-15 times, NVIDIA Forums.
From all the forums I have read it has to do something with the screen optimizations and Windows Updates.

Any clues, help, suggestions? Would it help if I gave my laptop to be looked over, since it still has it's warranty? Everything else: Videos, Browsers and etc. works fine, but once a game is started it begins to make these things. I repeat, those weren't appearing for a couple of months, so my best presumption is that it has to do something with a Windows Update. Sorry for the long thread and I hope anyone could help me.

Accepted answers

JackE

@NAtanasov Thanks for report. All the tests you did seemed to point at a hardware issue. Have you had a chance to test it yet? Jack E/NJ

All comments

Snoke

Not the computer at it appears to be more internet side the first clue was when you stated you adjust all the setting and it did not make a different the other thing that gives it away is your diagram if you notice your wi fi connection is all over the place,

so your Nvidia is working hard to compensate to adjust to the frequency changes in delivery causing your whole system to slow down.

One other thing if you got xbox console in the house or sony 4 turn off the xbox feature in the windows firewall advanced setting I disable all but Xbox indentity provider in both incoming and outgoing. that helps with bandwidth allocation.

Another thing is Windows defender does 3 scans while your systems running and you may need to make adjustments to limit uploads and downloads I set mine at 25% download and 20% percent upload.

to located them go setting then other to update and security you will see Advanced options click that open

scroll down to delivery optiminsation open that then locate advanced options again open it that where you make you adjust and tick the correct boxes.

NAtanasov

Snoke said:

Not the computer at it appears to be more internet side the first clue was when you stated you adjust all the setting and it did not make a different the other thing that gives it away is your diagram if you notice your wi fi connection is all over the place,
so your Nvidia is working hard to compensate to adjust to the frequency changes in delivery causing your whole system to slow down.
One other thing if you got xbox console in the house or sony 4 turn off the xbox feature in the windows firewall advanced setting I disable all but Xbox indentity provider in both incoming and outgoing. that helps with bandwidth allocation.
Another thing is Windows defender does 3 scans while your systems running and you may need to make adjustments to limit uploads and downloads I set mine at 25% download and 20% percent upload.
to located them go setting then other to update and security you will see Advanced options click that open
scroll down to delivery optiminsation open that then locate advanced options again open it that where you make you adjust and tick the correct boxes.

It is true that the internet is kinda funny here, but why didn't that be the case from the beginning? I mean the internet provider hasn't been changed or something like that. It does make sense though, since the internet hasn't been stable since the first day I moved in this apartment. If that is the case, it would be the worst scenario though, since I am not planning to stay here for a long time and hopefully will be able to move out in a couple of months. Still I was concerned about the strange noise the laptop made the other day and also I will buy the cooling pod because of the bad ventilation these things have. Thanks for pointing this out though!