Wouldn't scan, so uninstalled this to reinstall and now it will not reinstall

[exbrit]

That could very well be blocking it.  If you've already run a newly download MCPR and it said successful then the only other thing one can do is a registry cleanup which can be made simpler by looking in Windows Explorer at the folders on your drive and deleting any McAfee ones.  Then proceed as follows:

Go to Start/Run and enter regedit  and click OK.  In Windows 8 it's easiest just to click the Windows key + R simultaneously to bring up 'Run'.

After OK-ing the prompts 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 originally 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.

Message was edited by: Ex_Brit on 30/04/13 9:54:38 EDT AM

[ickkylan]

I started going through the registry and deleting all the mcafee files but got to one and it would not let me change permissions to allow me to delete it.

[exbrit]

Here's a Tutorial on taking ownership of files and there's a link at the bottom on how to give user permissions:  http://www.eightforums.com/tutorials/2808-take-ownership-file-folder-drive-registry-key-windows-8-a....

[pawelrozkrut]

So I succeeded in removing completely old McAfee and still new one would not install. The very same error is produced.

[exbrit]

Is there perhaps the leftovers of another type of protection too?

A screen shot of the error would help.

Actually the best people to help now are Technical Support and ask for an escalation to a higher tier.