Well the key is to show them things that affects the average user the most.
Security flaws and viruses are icing on the anti-tpc cake IMO(not the cake itself), staying away from the "wrong situations" keeps a computer low on hack attacks and viri. Although security+viri is a major issue, I feel it appears as paranoia to a certain extent. Im honestly not saying that it's BS, im just saying that it's not part of your standard n00b desires or concerns.
The spyware issue is worse then security flaws and viruses, it's guranteed to come off as paranoia and be unprovable to the standard person.
What you need is to bring up the issues of compatibility(hardware wise), stability, and speed. Bloat and backwards incompatibility(software wise) are so-so, but not your main anti-Microsoft selling points.
Hmmm wait a sec, were talking about TCPA not Microsoft stuff in general. BUT, what if it could be proven(my above pointS) that Microsoft sucks to the average user about average desires. Then use this as a booster to point out "If these guys make your Windows like this, do you trust them to give you the compatible, fast and stable TCPA interface that you deserve?"
Now in reality, NO ONE deserves a TCPA, it's a flawed concept regardless of who makes it or how good it actually is. However, you must come off as being concerned for their "bang for buck" and not for Microsoft dominating the cyber world etc. In addition, security might be something that could be utilized better to the layman in anti-TCPA arguments.
Before I finish, here's a n00b pro-TCPA argument I thought up.
"This may be true what you say about Wind0ze security, but with TCPA Microsoft is constantly monitoring the network. So the ball is out of my court, and in the hands of a massive team of computer security experts."
