Windows Vista Ultimate

First impressions:

Utter pile of crap.

Avoid.

It shouldn't take a rocket scientist several hours to consistently fail to even be able to download a file. Yes, you heard it. I've spent several hours attempting to download, er, a file. I'll say one thing for it: it's secure. But then, leaving my machine turned off is secure, too, and equivalently functional.

Buy. A. Mac. Instead.

Really.