It's amazing how people expect help by being rude.
If it doesn't uninstall the normal way, or using the MCPR removal tool (see Useful Links at the top of this page) then obviously something, probably either an infection or use of a registry cleaner, has corrupted it.
The only way then would be to try CCleaner which would probably work, or use the rather long and involved registry cleanup method as shown below, but before going there, have you thought of using Technical Support?
It's free by phone or online chat as I no doubt mentioned somewhere earlier in this thread.
Go to Start/Run and enter regedit and click OK. In Windows 8 it's easiest just to click the Windows key + R simultaneously.
A page should open with the top left hand corner looking something like this:
if for some reason it's expanded, collapse it and then highlight My Computer (Computer in Vista/Windows 7/8).
Go to File tab and click "Export" and send all of the registry to your desktop. This is in case something goes wrong. It can then be rebuilt by simply right-clicking that desktop item and selecting Merge.
Now click the Edit tab and then "Find". Enter "McAfee" (minus the "") then click "Find next" (or hit the enter key).
Whatever is found, right-click and delete.
Hit your F3 key for the next instance and keep going until all entries are gone. It can take a long time if a lot of McAfee components were oroginally installed and the MCPR removal tool (Useful Links at top of this page) didn't work for some reason.
If one says it can't be deleted this is where it gets complicated. You have to then find which key on the left column pertains to it and right-click/Properties/Permissions and give yourself permission.
I've given you your own thread.