The biggest give away for it is the clock.
TheOSINTguy
Have you tried to reinstall windows? Or at least run a repair? Sometimes this can be a OS problem.
You can also use a wattage meter where you plug the computer in and measure it through the meter. You could see if there is a abnormally high power draw and begin to narrow things down.
Unplug everything that isn't necessary to see if it's a accessory issue.
One last thing you can do is grab a pen and paper, and setup a software CPU temp monitor and write down everything that happens when it goes black. Especially sounds the computer makes.
Also try and replicate it with another monitor.
We have a small herd of deer that comes through our yard and we leave corn out in the winter and in the summer fill up a boulder that was carved out like a bowl over many years of sitting in a creek.
We have names for a few of them
- round ear (she has round ears, and is very old)
- chicky mama (she has at least 1 fawn every year)
- limpy ( she got hit by a car and now has a limp
- ticks ( this is the unlucky one that gets all the ticks)

That's the 4 of them
Oh my, what poetry, this is up there with YouTube apologies.
Ok, you sound very nervous by how your typing. Go take a few deep breaths and take a quick walk around the block or something so relax so you have a clear head to process this.
Once your done (I am going to assume you have android) download rethink DNS and look through the logs to see if there are any apps making suspicious requests and Google them to see what they are.
From there you can tell what's compromised and maybe how you got compromised so we can help
Can I ask you how you know they have access to your clipboard and downloads? And what the other user said, a factory reset should be enough.
Can I ask how you ended up compromising your phone?
HardCockSoftRock
Reference to the the hard rock casino
How should we discipline children
Well yeah I don't think any animal wants a tongue eating parasite in their mouth.
I find it fun listening to shortwave stations that aren't a bunch of crazies. The other night I was listening to a recording of an old radio show from the late 30's.