Hi Charlie. My name is Lester, and I am an Independent Advisor. I'd be more than happy to assist you. I'm so sorry that you are experiencing this issue. Don't worry, I'll do everything I can to help you.
Since your PC is stuck on the ASRock screen, please try to access Windows RE and reset from there:
Start your PC, and when you see the loading dots, press and hold the power button for 5-10 seconds to forcefully shut down.
Do this 2-3 times. This will enter you into the Windows Troubleshooting environment.
From the Choose an option screen, click Troubleshoot > Reset This PC.
I hope this helps. If you need further assistance, please let me know. Thank you.