Restoring the ASP.NET tab in IIS

Warning: This article is now 18 years old! It is highly likely that this information is out of date and the author will have completely forgotten about it. Please take care when following any guidance to ensure you have up-to-date recommendations.

If you’ve logged onto the properties for your IIS install and found that the ASP.NET tab has mysteriously disappered, you can try a couple of things.

Firstly, try re-registering ASP.NET with IIS using the ASPNET_REGIIS.exe located in the .NET installation folder:

c:\WINDOWS\MICROSOFT.NET\framework\\aspnet_regiis -i

Chances are though, that it won't work, and that you can try and number of command using aspnet_regiis.exe or even uninstalling and reinstalling .NET and you won't actually fix the problem. (Note: on x64 systems this could be a different problem, Google again with x64!)

This was solved by switching a flag (Enable32BitAppOnWin64) to false in the IIS metabase:

cd c:\Inetpub\AdminScripts\

cscript.exe adsutil.vbs set W3SVC/AppPools/Enable32BitAppOnWin64 FALSE

You should then be able to see the ASP.NET tab restored in the site properties.