Ok, I don't know why this question keeps popping up for EVERY piece of software. Other than the firewall being automatically turned on (it was a part of Windows XP since release. SP2 only beefed it up a little bit, and automatically turned it on), there shouldn't be any problems with running EQ2. Just allow it to pass info through the firewall and you should have no issues. I'm currently running Windows XP (SP2) with DirectX 9.0c (9.0c is required to run EQ2 btw). As of the patch last week, EQ2 will now require DirectX 9.0c. This should be a part of SP2 unless I'm mistaken, so you shouldn't have any issues.