Wait 30mins or so for repair to complete.In the window that appears, click 'Repair'.Click Modify (If greyed out then click Uninstall).Click 'Microsoft Visual Studio 20xx Shell (Isolated)'*.Type 'Shell' into the Search box that appears.Click 'Add or Remove Programs' from the list that appears.To perform the repair, please complete the following steps:
This is a common bug, and the solution in all versions of SQL Server is to repair the 'Microsoft Visual Studio 20xx Shell (Isolated)' program installation, which takes about 30 minutes to run unattended. For all versions of SQL Server, this can be fixed safely with no loss of data including any plugins that may be installed and their data.