You can also try running in Compatibility mode.
Running in Compatibility Mode to fix Windows Vista and/or Dual/Quad Core CPU Issues:
1. Right click on the Everquest shortcut you created during the eqemu setup process. The wiki page can be found here for information to get setup:
http://www.eqemulator.net/wiki/wikka...akka=PlayGuide
2. Select "Properties".
3. Click the "Compatibility" Tab.
4. Check the box for "Run this program in compatibility mode for:"
5. First try selecting Windows XP from the drop down menu there.
6. If Windows XP compatibility mode does not resolve the problem, try all of the other options 1 by one until one of them fixes it.
This fix does not work on all systems, but it has definitely helped to resolve issues for many people running Windows Vista and/or Dual/Quad core CPUs.