>>717079382Vista was fucked by third party drivers being incredibly shit during the first few years, plus oem manufacturers demanding Microsoft to let them slap a "Vista Ready" sticker on shitty Celerons with 512mb of RAM, which resulted in three minutes long boot time on your average notebook.
By the time SP2 came out, it was pretty stable. Win7 was great from the start because third party drivers were no longer a bsod fest.