They've helpfully (not) preinstalled Norton security suite, which will stop functioning in 90 days unless I fork over some money.
That annoys the hell out of me. If I wanted to sacrifice half my machine's performance, and introduce random bugs and untraceable problems, I would have written code that eats every other CPU cycle and trips exceptions every so often.
Fortunately, Norton uninstalls cleanly and easily (albeit slowly) from Vista, which in an improvement from the past, when dislodging it involved artillery shells.
This is so true it hurts.
My new car PC (the aforementioned broken laptop) is a clean install of Windows XP Pro, with no antivirus/firewall/etc whatsoever.
Damn it's fast despite being 2.5 years old.