Your computer doesn't meet the updated minimum specifications, which can lead to a poor experience

Update:

For anyone with a similar problem, I found a solution that works for me. After following an EXHAUSTIVE list of things to try from Meta Support, it seemed there was definitely a problem with cable/connection stability. I purchased an INIU link cable (that goes to a USB A, but has a separate USB C plug for wall power). 

Initially plugging it in didn't work and I had the same problem. BUT if I left the headset connected, ran services.msc (windows + R), selected right clicked on 'Oculus VR Runtime Service' and selected 'Restart' and then restarted my headset (while leaving it plugged in) by holding the power button and selecting "Restart" inside the headset. 

Then When I tried to connect to my PC it worked. I haven't seen how stable it is over a long time - but I got farther than ever before with the official link cable (with which the same process doesn't do anything). 

If  I disconnect the headset and reconnect it without going through the same steps again, it doesn't work and gets stuck on 3 dots loading screen, or can't find my PC. It only appears to work with this cable, and if I follow those steps. And it seems vital to plug the headset in before powering it on (or leaving it plugged in and restarting it). 

I won't accept this as a solution, because it is ridiculous to have to follow that procedure every time you want it to work. But it is certainly a step in the right direction, and also figuring out what the problem is.

Thanks to anyone that tried to offer solutions. And hello and goodbye if you read this far.