I am also getting these messages. I'm using Vista on a Dell Inspiron 1525.
In the last few days, when I have closed the error message, Windows suggests I run the McAfee AntiSpam update which provides a solution to the problem. The thing is, I chose not to install the anti spam stuff because of difficulties I've had with it in the past, and so can't install updates for it!
I am willing to experiment if I can find the time, but if there was an update coming soon that would solve the problem (without having SpamKiller installed) I would rather wait.
I have pasted it to: C:\Program Files\Common Files\McAfee\MSC
I then did the right click to "Run as Administrator" but the window that opens says the following...
Are you sure you extracted the files to C:\Program Files\Common Files\McAfee\MSC \ ? The current directory is C:\Windows\system32 Close this window, extract or copy the files to C:\Program Files\Common Files\Mc Afee\MSC\ and try again. Press any key to continue . . .
I then just double clicked on the copymcutil and got a message to say "DllUnregisterServer in McUtil.dll succeeded"