Writing here as no one else so far has been able to tell and answer on this, its not gog.com related but its about retro gaming:

I purchased command aces of the deep game from this guy who make retro games to work on modern windows computers and mac too:
https://www.allvideoclassicgames.com/

Here is the ebay page of the game I want to play again and have at my home and did in the past:
https://www.ebay.com/itm/COMMAND-ACES-OF-THE-DEEP-1Clk-Windows-10-8-7-Vista-XP-Install/254592610163?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

What Im worried now is that by how its emulated to work on modern pc´s its maybe damaging my computer due to this happened in the past:

On my 2 generations ago gaming pc I got this game and installed it and it runs perfectly and was much fun but after 1-2 months the computer just died on me, had it sent for fixing and apparently the harddrive had crashed so had to geta new one and windows 7 reinstalled. OK bad luck as the pc was from 2008 and this happened in 2015).
I reinstaled this game again and after 3-4 months the pc shut down all the time at random, at first when I started this game and then any game and then internet, just shuts down. It wasnt due to overheating and most of my friends had no idea why. So I decided to upgrade and get myself a new pc and now without a cd reader as all my pc games is anyways purchased digitally.
Now I realise that it might been the power unit in the pc that maybe was old and couldnt supply enough power for the pc when it wanted to power up the fans and do gaming.
But you see the dilema here: each time I installed the game and within 2-3 months my pc´s has crashed.

Now I have a state of the art gaming pc for over 4000 dollar and got the game on SD card but I hesitate to run it as Im worried the same thing will happen again...

How the games are made to run on any modern windows:
You get a cd/in my case a file where it installs the game and also a simulation of windows 95 and then I mean a complete windows 95 with all menus and drives and settings, overlay, windows button to turn the pc off, restart etc. On the desktop you have the game which you can start and the game register your pc as a windows 95 and runs as it should. You can only in this wndows 95 mode change time settings and screen resolutions but nothing else. To get out of this and in effect turn off the game: you need to select: restart this computer and after windows 95 closes, the program is turned off and you return to your windows 10/normal state.

I tried to google this or read up on how this is done and if it is damaging to my pc or if its a safe thing and I have nothing to worry about?

I have uploaded the game files so I could have it sent so someone who can this stuff can see and tell me?

If gog.com started to release older games again and especielly this and the other sierra simulator games, then I would use gog.coms version of the game and be safe about it :P

I'm reluctant to comment too much here due to the questionable/undetermined legality of the linked site.

My advice would be that it's unlikely that a video game install would cause a hardware failure. However, depending on how the virtual windows environment works, it may open up your PC to viruses. As a minimum, I'd run everything through an anti-virus first.

Where the games are available on GoG, I would strongly recommend purchasing them here instead.

As you dont buy anything in a link from his site or ebay: you buy the real games CD/floppy disk etc together with a cd with the emulation on which also has the game, its allowed to have copies of a game if you own or brought the original game whcih you do, at least in europe the law says that.

Same like you own a movie on DVD: then you are allowed to make a copy of it as long as you are the only one using it, but thats off topic anyways :P

Yes I ran it through anti virus checks and uploaded it to sites checking the files and it came clean, no malware or virus from what I can find.

Are you familiar with general virtualization? You might want to look at VirtualBox if you are concerned with potentially dodgy software. There is a lot of documentation and tutorials, but I can't guarantee it's a good solution for your game, just a way to try out.

No idea what that is or how it works besides it looks like its for business use.

It's an open source virtual machine, or at least it was years ago when I was using it. The commercial aspect is probably for business users that need more features. Although it's not stated outright, it should allow you to install Win95 or W98 to use with the game. You would need to learn to use it, though. In essence, it's like dosbox, but emulates a "full" windows environment that you set up. The GPU emulated is a very, very basic one, so that sector is still quite constrained.

You would need to source your own OS, though. It doesn't come with one.

OK, sounds like it does what the copy of command aces of the deep game I got from that site then, but can then be sure its safe and nothing harmful in it, if I get used to it and get it to work and then also get myself a cd reader and install it in my pc and then get the game to work in that virtual windows 95.

Well that's a bit tricky to answer, but a virtual machine in itself is a perfect environment to test these things out, since in theory everything that happens in it is constrained to the VM and shouldn't affect your PC, if properly set up.

The VM itself is just a program, it can harm your rig as much as, for instance, a game can if thermally overtaxing your system. In essence, it should be safe.

Yeah - I didn't look too closely into the site; it's better if you're getting the original/real games, and certainly speaks to it being more legitimate than my initial concerns. I'm less sure on the legal aspect behind how it's doing the Windows 95 emulation (i.e. whether you're buying a licence to run Windows 95), but that's probably off topic.

Any virtual environment of an old OS, I'd recommend disconnecting from the internet before running it. This may be a bit paranoid, but I'm not100% sure how well a virtual OS stands up to modern viruses, given they stopped getting security updates.

However, it shouldn't brick your hardware. Worst case, you get a virus, have to deep format the HDD and do a reinstall.

Virtual Machines are nice and all, but you know what else is nice?
A nice tall glass of Wine.

Keep in mind that the AppDB should be taken with a solid pillar of salt; many of the test results are from before the Proton days, and ergo should be considered worthless.

The problem is that Virtualbox doesn't have hardware acceleration for pre winXP or DirectX 8 and recently they've managed to break that up to Windows7 . Their forums are also ran by snarky morons.

Microsoft Virtual PC 2007 is another VM for playing win95,win98 and winXP but it doesn't have full hardware acceleration for graphics. I think it did direct3d acceleration but not DirectX which is what is really needed for the old 3D accelerated games.