How to Troubleshoot QuickBooks Error 12002?

QuickBooks Error 12002


QuickBooks users have been noticing QuickBooks Error 12002 when running QuickBooks on their systems. This error is more often related to a poor internet connection or when the network experiences timeouts. In this article, we will discuss the causes behind this error in QuickBooks and provide multiple approaches to resolve QuickBooks Error 12002.

QuickBooks Error Code 12002

Causes of QuickBooks Error 12002

The following are common causes that can trigger Error 12002 in QuickBooks:

  • Technical problems with the router.

  • Incorrect security settings.

  • Erroneous SSL settings.

  • Insufficient system storage.

  • Internet Explorer not the default web browser.

  • Poor internet connection.

Troubleshooting Methods for QuickBooks Error 12002

Method 1: Altering the Network Settings

  • Open Run window.

  • Type the command "INETCPL.CPL".

  • Hit Enter.

  • Make sure to configure the security level to a “Medium-High” level.

  • Tap on the Internet.

  • Then, advance to the Security section.

  • Move on to the Connections.

  • Herein, click on LAN settings.

  • Unmark "Use a proxy server for your LAN".

  • Ensure that you provide the correct IP address and port.

  • Follow up by clicking on "OK".

  • Navigate to the Advanced tab and go to Security.

  • Enable Use TLS 1.2.

  • To culminate, hit on "OK".

Method 2: Ensure Internet Explorer is the Default Browser

  • Use the Windows + R shortcut to open Run.

  • Type "INETCPL.CPL".

  • Click OK.

  • Go to the Programs option.

  • Choose Internet Explorer as the default browser.

Method 3: Updation of QuickBooks

  • Launch QuickBooks.

  • Click on the Help menu.

  • Tap on the option to Update QuickBooks Desktop.

  • Hit a click on Update Now.

  • Pick Get Updates. Ensure to checkmark the option to Reset Updates.

  • Click OK.

  • Close QuickBooks.

  • Make another attempt to download the updates.

Method 4: Discard QuickBooks From the Firewall

  • Click the Start button.

  • Type "firewall" and open Windows Firewall.

  • Head for the Advanced Settings.

  • Next, user can proceed by right-clicking the Inbound Rules.

  • Hit on the New Rule.

  • Opt for TCP, followed by clicking on the Port.

  • Click Next and enter the ports for QuickBooks.

  • Once the correct ports are entered, click Allow Connection.

  • Hit on Next.

  • Type a name for the newly created rule.

  • Tap on Next.

  • Press Enter.

  • Exact set of steps need to be implemented for the Outbound rules.

Method 5: Clean Installation of QuickBooks Desktop

  • Open Control Panel.

  • Proceed for Programs and Features.

  • User can proceed by tapping on QuickBooks, and following that, hit a click on Uninstall.

  • Alter the file name of the QuickBooks folder.

  • Restart the system and reinstall QuickBooks.


This article should clear all your doubts regarding QuickBooks Error 12002 and should have helped you in rooting out this error without any difficulty. For more support, just call our error support experts at the helpline +1-800-615-2347.

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