My Dell's power supply let the magic smoke out yesterday. I have a new one that should be showing up this afternoon along with some thermal grease for the CPU, which was all dried out.
I've finally upgraded the computer that is part of my Winlink 2000 station. I bought it from Amazon as a refurbished mini-tower with Win 10 for less than $150 US shipped to my house. I'm now running:
Dell Optiplex 755 mini-tower
Intel Core Duo 2 CPU (E8400) @ 3.00 GHz x 2
8 GB RAM
Windows 10 Home 64-bit version
Dedicated SIIG dual serial port PCI card, so I don't have to use USB-to-serial converters