I believe it supported memory protection, but not preemetive multithreading and multiprocessing. It was still cooperative multiprocessing underneath. If the p

I believe it supported memory protection, but not preemetive multithreading and multiprocessing. It was still cooperative multiprocessing underneath. If the program was written correctly (most were initially, since Win 3.1 was more common for a few years still), it would function on both just swimmingly.