What kind of fool would trust the same company that wrote that buggy, total seive of an operating system in the first place write an Anti-Spyware program?
My god man, get a clue.
Windows XP SP2 is neither "buggy" nor a "total seive (sic)". XP for home users has always been vastly better than the crap 95/98/ME line, though until SP2 I preferred 2K.
Personally, I don't care what OS anyone else uses, unlike certain *nix or MacOS fanboys. But I'm willing to bet that you couldn't do a thing to my XP machine.
By the way, the Microsoft antispyware app was written by GIANT and bought by Microsoft, so the "same company" didn't write it. Somehow, I don't see that fact affecting you in any way.
I don't think MS wrote it - I believe they bought the (very) good product Giant had.
I would like to debate you on why you think anyone who does not suscribe to your world view needs a 'clue.' But anyone who cannot capitalize God is a lost cause. Let's try again this again when you mature.