ASP.NET Tab in IIS is Missing

Here are the steps to fix the issue:

1) Stop the IIS Admin service (and any services that depend on it)

2) Open C:\WINDOWS\system32\inetsrv\MetaBase.xml in notepad or your favorite XML

Editor. _DELETE_ the line that reads ‘Enable32BitAppOnWin64=”TRUE”’

3) Start -> Run -> iisreset