An extremely usefull link about this problem: http://crm.vdsnickt.eu/2010/05/ms-crm-4-0-setup-error-asp-net-is-not-installed/ Ran into the problem while trying to upgrade from CRM3.0 to 2011 which requires 3.0 to be upgraded to 4.0. The problem is caused by the CRM 4.0 installer being a bit retarded as the poster points out. Simply adding ASP.net 2.0 to the ASAPI filter list […]