.Moved to VirusScan for better attention.
To find things like MCPR you would normally go to Technical Support - see McAfee Support or Useful Links at the top of the page, and search the database for it, however it is linked under Useful Links at the top of this page also.
Try removing in the normal way first, Control Panel > Programs > Uninstall a Program (Add or Remove Programs in XP) because that will decrement the online account and show 1 less machine using it.
Then run MCPR and reboot. Run it again if necessary.
Note: MCPR only works with the consumer/home products and those only as far back as 2005 versions.