Hey
@TheWeetek,
That's very unfortunate to hear. I'm afraid that it looks like not a single troubleshooting step seems to work for the issue that you're experiencing. And unfortunately you also don't have another device to try it on, so we can maybe exclude some other potential factors.
In this case I think the best thing you can do is trying to get in touch with a PC specialist to let them take a look at your machine, maybe they can figure out if it's something hardware related even, something we cannot really see from this side.
It's an unfortunate situation, but I am afraid that our troubleshooting steps can only do so much.
