http://blogs.technet.com/tonyso/archive/2008/03/24/free-suport-for-vista-sp1-install.aspxCopy/paste and send the following link to your users who call with any issues for Vista SP1 install. They can select an option for Unlimited installation and compatibility support at no charge until March 18, 2009 . https://support.microsoft.com/oas/default.aspx?ln=en-us&amp;prid=11274&amp;gprid=500921en-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/tonyso/archive/2008/03/24/free-suport-for-vista-sp1-install.aspx#3019575Mon, 24 Mar 2008 20:00:50 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3019575Aaron Tiensivu's Blog<p>Having issues with getting Vista SP1 installed? Select the option for Unlimited installation and compatibility support at no charge until March 18, 2009 - here. Originally spotted here. Despite what you might hear from the Vista haters, every SP1 i</p>