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https://nishantrana.me/2016/11/25/error-installing-report-authoring-extension-setup-cannot-continue-because-there-is-a-pending-restart-required-restart-the-computer-and-then-try-running-setup-again-in-dyn/
Error installing Report Authoring Extension – “Setup cannot continue because there is a pending restart required. Restart the computer and then try running Setup again” in Dynamics 365