Windows XP was for Windows eXPerience, Windows NT was New Technology and Windows ME was Millenium Edition. Not that it leaves us any the wiser !
I have what would be called an aging Q6600 but beefed up with SSD for OS and other separate drives for samplea and projects, additional memory and 3 monitor video card and whilst it was good on Win 7 Pro 64-bit, since my Win 10 upgrade it is even snappier, and DPC latency has dropped too. So, I'm all for it.