So....If you kill the McAfee processes does it work?
If anything happens you just reboot.
Rebooting would just start the process again once you load it again.
By reboot he means switch your pc off, then on again.So click on the McAfee close icon, the red cross in the corner, then try your server. If it doesn't work, switch your pc off, then on again, and McAfee will be back to normal.