Lemme know when you're ready to buy, and I can make some recommendations. Amazon has a large selection of these really cheap MiniPCs, typically < $200. They're underpowered compared to a desktop, but from what you've written over the years, they're enough to let you browse the web, check your email, and even watch a few videos. Speaking of video, if there's one place you could spend extra, it'd be to get a 4K monitor, which is supported by almost all the little PCs. Maybe not right now, because there's a world wide shortage of flat panel displays, most of them coming from China. But that should clear soon. Before the shortage there were some down in the $200 range.

I hate to sound like a Microsoft fan boy, but in all honesty I have to say that Windows 10 has grown up, into something that's actually easy to use and pretty reliable. I was talking to my sister the other day about how she's clinging to Windows 7 because she doesn't want to learn a different interface, but I tried to explain to her that the improvements definitely outweigh the learning curve. The thing rarely gets a blue screen of death anymore, and it can repair itself after a lot of crashes. Stronger security, too, with a built-in virus checker that's just about destroyed the third-party antivirus market. You won't regret upgrading, I promise.