McAfee error in Outlook W2K

I get an error message when opening Outlook W2K but is still able to receive emails.
After I installed a trial ver. of McAfee VirusScan this happened. As well, I am unable to unistall McAfee.
This the error msg:
?The add-in ?c:\program files\McAfee VirusScan\scanemal.dll? could not be installed or loaded. This problem may be resolved by using Detect and Repair on the help menu. Unable to load :c:\program files\McAfee VirusScan?? You may be out of memory, out of system resources, or missinga .dll file.?
Please help! thanks