I'm also running Win XP with XP2 (final RTM) installed, but I have the XP firewall disabled (using Norton Internet Security, and I have eon blocked from accessing the net), and I've experienced no problems with crashing. About the only time the program will crash is when I attempt to import multiple, large pz3 files, basically stressing my system to it's limits (AMD 2200+ running at 2.0Ghz with 1Gb DDR Ram, Nvidia GForce MX 5200). I have open GL and background draw enabled with the default settings. It's a shame that Eon has to build in anti-piracy protection, but I do understand why they have to do so, I just which they'd choose another method as I feel that their current method can cause problems for registered users.