As I said in response to the other thread, you probably have the ground connection between chassis and the master switch (driver door)? broken. This will make all windows stop working.
I had this problem on my 91 Ciera and fixed it by connecting to the master switch black wire with a wire to the door frame.
Try connecting a jumper wire from any metal surface to the black wire at the master switch and then try the windows.
I had other problems with individual power windows over the years and those problems were with broken wires inside the rubber tube near the door hinges. Seems the wires can only take a few million door openings and closings! I scrapped the car this year with 383,000 Km on it. Kept the service manuals though!