[trevius]

You can try a 3rd party program like Runfirst to start EQ and set it to run on a single core.

Try doing the following steps exactly in order:
1. Download runfirst.exe and put it in your main Everquest folder
3. Right click on runfirst.exe, hold right click, and drag it to desktop. Choose "Create shortcut here" on the menu that appears. (alternately you can right click and choose "send to desktop" instead of dragging it)
4. Right click on the shortcut to runfirst.exe on your desktop and choose "properties"
5. You will see a line like:

C:\Program Files\Sony\Everquest\runfirst.exe

6. Do not modify that line at all. Add a space and then:

"eqgame.exe patchme"

to the end, so the whole shortcut reads something like:

C:\Program Files\Sony\Everquest\runfirst.exe "eqgame.exe patchme"

7. Hit the apply button at the bottom, then hit the OK button to close the window.
8. Run EQ via the shortcut to runfirst.exe. You can change the name and icon graphic if you like.
9. Once EQ starts, you can close the runfirst command prompt window.

I have been working like crazy to resolve a weird issue that appears to be processor related and may or may not be another dual core problem. While working on it, I have come across just about every known dual core fix there is. I will try to get most of them posted when I get a chance. Maybe when I am all done, I will write up a nice troubleshooting guide for it.