Microsoft tried not to increase the minimum specs required over XP very much. This lead to certifying a bunch of underpowered hardware as "built for Vista" whic

Microsoft tried not to increase the minimum specs required over XP very much. This lead to certifying a bunch of underpowered hardware as "built for Vista" which lead to many, many people having super slow computers. On top of that, the UAC used to be a security boundary and it would prompt very often because Windows software had been written to behave like it was on a single-user system and mess with system files all the time, so it was really annoying.