HubSpot Sales for Outlook install error: 'Application cannot be started. Contact the application vendor.'

You may encounter the following error messages when attempting to install the HubSpot Sales Outlook desktop add-in:

Application cannot be started. Contact the application vendor. 

To resolve this error:

• Uninstall the HubSpot Sales Outlook desktop add-in.
• Press CTRL + ALT + DEL and open Task Manager, then end the SidekickTrayWPF.exe process.
• Navigate to Control Panel and select Uninstall a program or Add or remove programs. 
• Search for and uninstall HubSpot Sales for Windows.
• Install the HubSpot Sales for Windows tray app.