If you have the below error in Visual Studio when you try and debug a SharePoint App: Severity Code Description Project File Line Error Error occurred in deployment step 'Install app for SharePoint': The file exists. (Exception from HRESULT: 0x80070050) [AppName] 0 You have properly already tried: - Clean the solution - Manually uninstall the solution - Upgraded the App version number - Retracting the solution If none of the above works and you are pulling your hair for a solution, try and run Visual Studio in Administrative mode . This have fixed the problem for me many times and i think it was time to share it :-).
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