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.