Don't run the setup from your existing Windows (how do you mean "task manager") but boot from that USB. Fill in the first install screen (with language and keyboard choice) and see what happens.
https://www.techadvisor.co.uk/how-to/windows/how-reinstall-windows-3535423/ tells more.
After windows 10 update I got an error saying 'desktop location invalid', couldn't click on anything and only had recycle bean on my desktop (also couldn't be clicked on). So I got w10 on my usb from healthy pc, loaded task manager and started set up for new windows. After 20 % laptop restarted and since then it keeps restarting and I can't do anything. Screen loads, for 1 sec i see cmd, 1 sec windows setup (0%) and it restarts again. Any suggestions?