So, I tried updating my graphics drivers, and as a result I've been struggling for a day. My computer would freeze and wouldn't install the latest AMD drivers. Eventually, I got my drivers from my manufacturer's (DELL) site. I believe they are not the latest out there, but I may be wrong. Still, I'm happy with the results. My viewport is actually rendering in Preview Mode! I'm posting a screenshot. I would like some feedback: do you believe what is depicted here is the result I should be expecting? My only concern is the crust on the top of the donut. There is a reflection node in the setup, so I guess EEVEE has a reason for projecting the surrounding world on it, but is that what it really should look like?

Thank you for looking into the problem. Here are the files you requested: