I recently had to re-install XP (I really like XP) and had a lot of problems, drivers, etc. I think everything is working OK now Internet, audio, etc.). However, I can't install Windows 2000. I've tried my original W 2000 CD, and a new to me copy from a reliable eBay vendor. Both of then get a message that says "we" can't verify the license number. My original W 2000 CD has been installed on many PC's thru the years, most recently on a Windows 10 PC. Any ideas?