Phead Yes, I followed the Android Flash Tool instructions. I then had to install device specific drivers. In particular, I have followed the following instructions:
- I have loaded the manufacturer-specific updates for my PC (according to the instructions).
- I installed Android Studio and installed the USB drivers within Android Studio (according to the instructions).
This has resulted in me being able to start the process. However, I then had to install more drivers after my Pixel rebooted and lost connection to my PC. Unfortunately, I can't reconstruct exactly what that was, but I more or less followed the troubleshooting instructions on the screen. Sorry, it's been over a week now and I've been busy setting up my system in between.
I hope this also helps others who are facing this problem.
Thank you all for your great support!