Windows Vista and Windows 7
The Windows Message Queuing component must be manually installed on the machine(s) hosting the Workflow Server and Subscriber.
Note: The steps below may differ slightly depending on your operating system.
To install this component
- Click the Start icon.
- Click Control Panel.
- Select Programs and Features.
Note: If Programs and Features is not displayed, select Programs, then Programs and Features.
- Select
Turn Windows features on or off. You may be prompted to grant User Access Control. 
- In the
Windows Features dialog box,
expand Microsoft Message Queue (MSMQ) Server.
- Expand Microsoft Message Queue (MSMQ) Server Core.
- Select MSMQ HTTP Support from the list of
sub-components . Optionally, you can select the other sub-components, but they are not required by Workflow.
-
Click OK to begin the installation. You may be asked to insert your Windows Installation CD and to restart the computer.