98
Microsoft Ruined Windows
(www.youtube.com)
This is a most excellent place for technology news and articles.
The last fond memories I have of using Windows were 3.11 and 95/98SE. XP was useable but ugly. 7 was nicer than XP but a lot slower. Everything else has been awful.
You skipped the dumster fire that was Vista
There is no OS called Vista 🙂