Alt-tabbing causes random clicks to return me to desktop

[TicklePants]

So I'm a bit new to project 1999. When I load EQ it loads in fullscreen with no problem. However, when try to log onto a server, it goes to windowed mode. That wouldn't be too big of a deal, but then after I load whenever I place my mouse on the lower half of the screen it turns into the regular windows mouse, and if I click it brings me to my desktop. It's extremely annoying and it's making it impossible to click anything in game without inadvertently minimizing EQ. What's the deal? I'm running on windows 7.