https://pcpartpicker.com/list/p76L8K
Psu included
Faster memory included
Bigger SSD included
These 3 main things kept your build from being moderately decent.
Good!
Now for the crashing you can most likely use this tool to make clean media and it shouldn't crash hopefully
https://www.microsoft.com/en-us/software-download/windows10
I have worked closely with Acer notebooks and have dealt with this issue numerous times.
The only possible options are... !
Unplug the charger and hold down the power button for 60 seconds
Device manager uninstall the Microsoft ac adapter and Microsoft acpi compliant control method battery under the battery category
Update the bios (Risky because if the unit looses power it will brick it.)
Also unplugging it while inside of bios to confirm if the battery is the crook or the OS is.
You can try making a new User account via netplwiz in a run box.
Also running it in safemode is a good bet.
Reinstalling the GPU drivers would possibly help.
I believe that the GPU has lived it's life well but here is some fighting steps.
Try another PCIe slot.
Take a can of compressed air to the PCIe slots.
Pull the CMOS battery while your in to reset the bios config.
Reinstall the drivers from the OEM site.
Final STEP - Reinstall the OS.
Keep in mind it's a 5 year old GPU with lots of runtime I assume.
A list of spec's would help.
But pulling the CMOS battery while the GPU is installed and the computer is off is a start.
Also try using cables with no adapters preferably HDMI to HDMI straight to the monitor. I've had a problem like this when my HDMI TO DVI-D adapter was a slight bit loose just a complete black screen.
You can always go into device manager and edit the power settings of the device like your LAN adapter not to sleep or your wireless adapter when the computer sleeps.
It's alright but if your running just Windows firewall. Windows defender is also running so I'd say it's okay unless your running through the sketchiest websites getting free torrents and cracks etc..
I would have it Full factory reset to the latest 1703 windows build if the GUI of the OS is acting up like that.
You can always create fresh media with this https://www.microsoft.com/en-us/software-download/windows10
What you're looking for is to 'spin down' a drive.
If you want to disable drives with the command line, you can use DevCon:
devcon disable <hardware id>
Using the device manager:
Right click on disk > disable
I'd check the CPU heat sink is properly secured and plugged into the right CPU fan slot in the MOBO like so http://www.phoronix.net/image.php?id=gigabyte-h110-linux&image=gigabyte_h110_5_med
Also reseating ram and GPU won't hurt it.
But if you adjusted the mini cables from the Case to the MOBO again and now it's worse then you probably didn't do it right.