HubSpot Sales Outlook desktop add-in install error: 'an application with the same identity is already installed'

Last updated: March 6, 2018

Available For:

Marketing: N/A
Sales: Free, Starter, Professional

Follow the steps below if you've attempted to install the HubSpot Sales Outlook desktop add-in and encounter an Unable to install this application because an application with the same identity is already installed error message. 


To resolve this error: 

  • Uninstall the add-in by following these instructions.
  • Copy and paste C:\Users\%Username%\AppData\Roaming\Sidekick into the Start menu and press Enter.

  • Delete all contents of the \Sidekick folder.
  • Navigate to the Registry Editor by typing regedit in the Start menu and clicking on regedit.
  • Click the triangle next to HKEY_CURRENT_USER to expand the folder.
  • Expand Software > Microsoft > Office > Outlook > Add-Ins

  • Right-click on Sidekick and click Delete.
  • Collapse Add-Ins > Outlook > Office so you're back in the Microsoft folder.
  • Expand VSTA > Solutions.
  • Under Solutions, you will see one or several folders. Click one to see a list of files in the right-hand pane of the window. 
  • Go through each folder under Solutions and find one in which the value in the Data column for the ProductName file is HubSpot Sales for Outlook. 
  • Remove the entire folder that contains the HubSpot Sales for Outlook ProductName file.  

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