Norton Antivirus 2010 and Norton Internet Security 2010 are designed for use in Windows 7. Norton Antivirus 2009, Norton Internet Security 2009 and Norton 360 version 3.0 can all download a compatibility update through the Internet to make them compatible with Windows 7. I'd really recommend getting the latest version, i.e. NAV2010 or NIS2010 to be sure.