Install ASP.NET 4.5 in Windows 8 and Windows Server 2012

The Aspnet_regiis.exe utility is no longer used for installing and uninstalling ASP.NET 4.5 in Windows 8. ASP.NET 4.5 is now a Windows component and can be installed and uninstalled just like any other Windows component.

To install or uninstall ASP.NET 4.5 in Windows 8 or Windows Server 2012, use one of the following options:

  • Run the following command from an administrative command prompt: Console
dism /online /enable-feature /featurename:IIS-ASPNET45

For Windows 8 client computers, turn on IIS-ASPNET45 in Turn Windows Features On/Off under Internet Information Services > World Wide Web Services > Application Development Features > ASP.NET 4.5.

For Windows Server 2012 computers, enable IIS-ASPNET45 using Server Manager, under Web Server (IIS) > Web Server > Application Development > ASP.NET 4.5.

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