So… I played Minecraft and the PC had overwhelmed itself. As usual: Windows processes: This Windows program no longer reacts. I clicked on close process and then the whole virtual desktop was simply gone… As if I had stopped that. Then I restarted my PC. And it was still like this… So I tried to create a new desktop with Windows + ctrl + d but it didn't work… Since an app always opens automatically I was able to use the "forwarding link" to get into the browser and ask yourself this question… What NOW?! SOLVED. ALL GOOD
Try starting Windows in Safe Mode. If that works, look for the startup folder and see whether there's a link to the interfering app. If so, delete it and restart Windows in normal mode.