http://blogs.iis.net/thomad/archive/2009/03/28/what-account-is-your-apppool-running-as.aspxIIS 7.5 on Windows 7 and Windows Server 2008 R2 is changing the default Application Pool identity from NetworkService to virtual accounts with the name of the Application Pool itself. The Application Pool ‘DefaultAppPool’ will run as the virtual accountenCommunityServer 2007 SP1 (Build: 20510.895)