Microsoft has just snared a U.S. patent for proactive virus protection, which is how security software helps secure your PC when it encounters shape-shifting malware not already in its antivirus definition file. What I want to know is, what does this mean for all the other vendors -- like McAfee,Symantec, Kaspersky, and Trend Micro -- that have been selling proactive protection software for years? Do they now have to pay Microsoft protection; I mean, royalties?
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