I just installed XP on a Linux Laptop for a Lady who thought Linux would work because about all she did with a Computer was Voice Chat with her Mom, and do email.
She said she spent a lot of time first trying to get her Wireless Headset to work. A MS XBox 360 wireless mic and earphone. That Failed linux just would not recognize it.
Then she couldn't find a application that would allow her to use Voice Chat services on MSN Messenger, she could type messages, but not voice Chat.
So it can be something pretty simple for Windows to do that Linux can't cope with, or you the user can't figure out how to configure.