ArcGIS 101 Server Web Adaptor Installation issue

[harleypowers_parks]

this is the silent install with an ags directory name:
msiexec /I D:\WebAdaptor\IIS\setup.msi WEBSITE_ID=1 VDIRNAME=ags /qb


below image shows the problem. 
[ATTACH=CONFIG]17058[/ATTACH]

[BubbaHey]

Look at this thread:  http://forums.arcgis.com/threads/45825-IIS-Web-Adaptor-Install-Error

ESRI suggested the following which worked:

As a workaround, you should be able to install the Web Adaptor by explicitly defining the website via command line. For example, from a command prompt with administrative privileges, run:

msiexec /I <path to setup files>\setup.msi WEBSITE_ID=1 VDIRNAME=arcgis /qb

[harleypowers_parks]

yes, that's not a bad forum thread. thanks for listing it.