@ Pierre re: malware
Simple solution, reboot the computer, insert Vista install DVD, boot recovery and then fire up the console, open terminal window, CD to the directory where the malware is, delete.
The terminal on the install disc is not subject to UAC and is logged in as administrator by default. Spending hours trying to solve a problem then blaming the OS when the issue could be solved in seconds is kind of silly.
Heck, you could even boot up a Linux live CD, mount the NTFS drive with read/write and delete it that way, you just went around the problem with the wrong solution.
Back on topic. The Ubuntu system was always going to win this, but it is nice to see MS (please, M$? it wasn't funny 10 years ago, it isn't funny now) taking a better stance at security, if only the 3rd party vendors would actually do the same. If the vuln in Flash didn't exist, then we would have Vista and Ubuntu remaining standing, a feat which would have been unheard of with XP.
Give it another decade or so, and maybe Linux will be ready to compete with Windows on the desktop, or, the most likely result, Apple's OS will start to get a pretty decent market share, then the EU will step in and force them to remove TPM, so PC users will be able to wonder why such a poor excuse for an OS is actually "popular".