The Application or DLL C:\Program Files\Sony\Everquest\DSETUP.dll is not a valid
 

getting this message when trying to run EQEMU. eqgame.exe - Bad Image...
This has been an interesting day it started off with Avast deleting my .dll files and now I got that sorted EQEmu is acting fritzy anyone got any ideas ?

avast did the same thing to me last night when I was trying to run EQ. Have been playing just fine for weeks and all of a sudden this happens. However, my comp begins to attempt to run the patch and i get the error "Could not establish a connection. Please check your network connection or contact eqtech@soe.sony.com

If you're on P99 you should check their forums. I don't know if they are still using that dll for their injection, but if so that might explain it.