If you are working in old version of IIS, you may
not find the latest application pools for .Net 4.0. This small article provides
to install the missing .Net 4.0 application pools.
Manually install the .Net 4.0 Application
Step 1: Open command prompt and locate
the 4.0 folder
Step 2: Use the command
Wait for the installation to complete.
Step 3: Open IIS Manager to view
You can click on the Application Pools link on the left to
view the installed .Net 4.0 pools