Ok, got it solved. Here's what happened, strange as this fix sounds, here goes.....

The repair shop said a blown radio fuse (A1) will cause the radio to be always on, and perhaps cause the windows to not work, which is what was happening to me. My A1 fuse was in fact, blown.

I replaced the fuse, and everything worked fine for about 1/2 hour, until it started to do the same thing. I checked the fuse, the fuse was fine.

Went to the repair shop today, he looked at all my "fine" fuses. The metal on the fuses was all chalked up. He said they should be changed; the chalking is preventing a clean connection and it builds up resistance. When resistance is there, it causes heat buildup, which could cause some weird electrical problems, like the radio and power windows not working.

I immediately replaced all the fuses, and the problem went away. All is well now!