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- Open the IIS Manager
- Click on the Default Web Site
- Double click on "Handler Mappings" on the right.
- Select the ISAPI-dll mapping
- On the right column click on "Edit Feature Permissions"
- Check the "Execute" checkbox.
Restart IIS
- Navigate to Start Menu > Administrative Tools > Server Manager.
- In the Server Manager, click on Roles and right click Web Server (IIS).
- On the right panel, look for the section '''System Services'''.
- Restart World Wide Web Publishing Service.
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