I just use an Apple TV box these days, but ~15 years ago I was running a Windows 7 Media Center PC for DVR and a few saved movies. The best remote was a TiVo Slide Pro (no longer made, and my wife broke the one we had). Normal TiVo remote buttons on top, slides open to expose a small keyboard. They occasionally show up on eBay or if you have a local source, use that. You'll need one that has the RF dongle to be able to use the keyboard with anything other than an RF-capable TiVo.