Guess what! I changed my processor to an Intel Core 2 Quad Q9400 and was able to install macOS High Sierra 10.13.2 without a glitch, even though my motherboard and graphics board are old. It's running beautifully, except Sleep. No problems on restart or shutdown. When I put the system to sleep, it restarts. Any ideas on what could be going on? I've enclosed a zip file of my Clover folder. Thank you very much for your time, kind attention and help. I really appreciate it.
macOS High Sierra 10.13.2 from App Store
Motherboard Gigabyte GA-G41MT-S2P F3
Intel Core 2 Quad Q9400
8 gigabytes of RAM
nVidia GeForce 9500 GT with 1gb
Two Samsung 500gb SATA HDs