IIS Web Adaptor Install Error

Discussion created by gsimpson4 on Dec 13, 2011
Latest reply on Jan 30, 2015 by hmelendezgmtgis-esridist
I am unable to install the IIS Web Adaptor due to the following error:

Error: 2878.  On the dialog WebSiteList the control ListBox1 has a possible value: Default Web Site,80,1.  This is an invalid or duplicate value.

I'm using IIS 7 on Windows Server 2008 R2.  There are no other web sites listed in the MMC.  Has anyone else seen this or know of a solution?