i use a dell with xp at work. it is FRESH OUT OF THE BOX, and has so many problems i can't even begin to tell you.
slow as hell, locks up whenever i try to shut down or log out, locks up any time i try to open more than one tab in a browser....THIS THING WAS FRESH OUT OF THE BOX, mind you.
bottom line: a computer that is brand fucking new shouldn't be having problems like this. don;t tell me "you have to install service pack such and such, you have to get this or that component or software"...FUCK THAT. if i'm paying good money for a computer, it should come with everything i need, ready to go.
in contrast, my home computer (powerbook G4) has worked without any major issues for 5 years and running. free self-installing updates from apple, no fuss, no worry. maybe you like to spend hours and hours tinkering and fucking with your dell, but i love that my computer runs smoothly with minimal maintenance.
PS. i'm not one of those rabid mac freaks either, i have tried both platforms, and i prefer mac for the aforementioned reasons. i still have to use my Dell with XP at work every single day, which just reminds me of how much it sucks balls... hence why i responded to the thread.