I think it's due to the fact that its a hook dll, which could potentially send keyboard entries to a third party. As a keyboard hook its probably been identified as such by name in the database as having the potential for misuse. I've never had a problem with any other software, and most of my other stuff is tested and verified problem free at many sites including Softpedia, OATS etc. None of my AV and Anti Spyware has a prob with it, McAfee, Counterspy etc.