Originally posted by: mechBgon
If you think SP2 is mainly a pop-up blocker, a firewall and reminders, you're merely looking at the superficial stuff. Remember the zero-day WMF exploit that was running around for close to a month before it was brought to light and detectable by antivirus apps? With SP2 and a hardware-DEP-equipped CPU, you could be preemptively protected from that, to give just a single example of how SP2 is better.
And if you think you need an antispyware app like Defender, but
not SP2, then I don't understand your logic.

In the WMF exploit example, guess what it was being used to do? Install nasty stuff like SpyAxe. Having used Microsoft AntiSpyware beta before, I can also remark that any "slowdown" resulting from SP2 is going to pale in comparison to the sluggish feel of a system equipped with MS AntiSpyware.
Think about this. If you are installing SP2 on a longstanding Windows install then I do suggest installing it in Safe Mode.