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When an update is running and the software cannot establish a connection to the server, QuickBooks Desktop Error 12009 appears. Usually, a firewall, a network timeout, or a problem with internet connectivity causes this error. Incorrect SSL settings or improperly configured Internet Explorer settings can also cause it. Users should verify that their firewall and security settings are configured to permit QuickBooks updates, check their internet connection, and make sure that Internet Explorer and SSL are configured correctly in order to fix Error 12009. Make an appointment at 1.855.856.0042 to speak with a qualified QB.
