Hardware doesn?t run well on Vista (even new hardware)
The new security of Vista is overkill most of the time, being prompted for every little thing - Vista even labels existing applications as suspicious.
Lack of drivers for older and newer hardware.
Power options don't change automatically for laptops. Whether you are plugged or unplugged from a power source.
The Start Menu has been redone so it is hard to navigate and find what you are looking for.
Rebooting a Vista machine takes longer than XP.
Aero UI is great to look at, but resource hog
The many different versions of Vista will be confusing to basic computer users.
Graphic performance sucks compared to XP.
Basic functions like add/remove programs are hard to find.
VPN doesn?t work correctly.
Software that is supposed to be windows compatible shuts down randomly.
Minor changes to hardware may prevent the system to boot up.
No ?open with? when right clicking on a file.
to list just a few
