Crash to desktop when going full screen

[Zonx]

To resolve crashes like this, the SOE support DB recomends defragging your drive and disabeling all startup tasks since some may be attempting to share resources EQ2 expects to have eclusive rights to.

This did solve crashing issues on my XP box.

Once you've confirmed this resolves the crash issue, you can try reenabeling startup tasks in a process of elimination order to issolate which task is causing the problem and only leave that one disabled.