It may also be a matter of what is counted as a file by each programs.
For example, is a .CAB or .ZIP counted as 1 file or as the number of files that they contain (+ 1 for the .CAB / .ZIP itself?). I believe AdAware does the latter. McAfee may do the former or even deliberatly ignore things like .CABs on the assumption that on access scanning will detect any viruses if and when something is taken out of the CABinet.
If you set adawre to do a smart system scan it will only scan ares that are most at threat,if you set it for a full scan it will scan every file and folder,resulting in a larger longer search,and more files.
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