Windows, after 98SP2 and XP it just became absolutely untenable. (it started during XP already) Any pre-installed version was rife with junk one just wanted to get rid of. What still remains to this day, the inexplicable slowdown between a fresh install and a couple of months down the road, at boot time processes which keep writing to hd choking the os for tens of minutes, restore point hell, ... anti-virus which guaranteed ruins your OS ... software that somehow gets installed out of nowhere ... a printer completely impossible to install, then there's the 600mb HP printer software you need to install ... the endless dialog questions you are bombarded with at random times ... I think many people accept this as normal, part of how things are. I switched to Linux and it stays out of my way. I do recognize that some of its configs are difficult for the non-experienced user, however on the flip side you can actually do fixes yourself. Its comparable to someone who can work on his/her own car. YMMV.