The PolicyKey [1] is one element of HSU's effort to keep our networks and all the computers that connect to those networks free of viruses and other malware [2], as well as ensuring that everyone is running the most-up-to-date and secure versions of their operating systems and security software. A side benefit for users is that, in addition to keeping your system malware-free, network access is faster because malware isn't clogging the Internet connection and the use of bandwidth-hogging applications is very limited.
Links:
[1] http://www.humboldt.edu/its/glossary/5#term136
[2] http://www.humboldt.edu/its/glossary/5#term200