Windows 8 - not able to install Windows Identity Foundation

If you try to install Windows Identity Foundation (WIF) runtime system (pre-req for the WIF SDK) on Windows 8 Consumer Preview, you will get the error "The update is not applicable to your computer" in figure 1:

Figure 1: Error when trying to install WIF on Windows 8

To fix this, the WIF runtime system is now part of Windows 8 and can be installed as a Windows feature like IIS, so the WIF runtime system doesn't need to be downloaded. To do this run Control Panel > Programs and Features > Turn Windows Features on or off. 

Then check the Windows Identity Foundation 3.5 check box in the Windows Features dialogue box and click OK:

Figure 2: Installing WIF on Windows 8

Once you have done that then you'll be able to install the WIF SDK.

Figure 3: Now able to install WIF SDK on Windows 8

Once the WIF SDK installer is complete, you'll be able to reference the WIF API's from Visual Studio and use WIF on Windows 8 for your federated identity needs.