Just a heads up, kaspersky has quietly updated and released their latest version of the antivirus. http://www.kaspersky.com/kis_latest_versions Tons of new features are out such as: System requirements are nothing special Oh and older KAV/KIS 2009 keys work just fine - so that means YES, you can update over the top of an existing install, or buy a 2009 key off ebay and it still works. P.S: dont buy from kaspersky, buy from ebay - its usually far less than 1/2 price there. Edit: i just checked out game mode: heres a screenshot for you (this is NOT enabled by default) Vulnerability scanner is great - i've disabled autorun from network drives, flash drives, hard drives and portable media drives through this handy tool. It also gives you a list of all programs on your PC with know security flaws - such as telling me my winamp is outdated. Update: To users of KIS 2009 who want to activate Via the KEY file, you can install in trial mode and use it later. Its only during the initial install that it wont let you use a key file.