post that in the tech support forum for starters...
https://everquest.allakhazam.com/forum.html?forum=25 Failing that, try restarting and press F8 and see if you can get into command prompt mode. If so, delete it from there. If not, try deleting it from safe mode.
If that still won't work, try renaming the file and re-downloading a copy.
If that still won't work, run disk defragmenter and attempt to remove it after that.