How to Troubleshoot QuickBooks Error 12002?

The QuickBooks Error Code 12002 has been annoying a plethora of QuickBooks users lately. This error appears when using QuickBooks and generally occurs due to a slow internet connection or due to a network timeout.  There are different solutions to get rid of this error, all of which shall be explained in this article.

Factors Causing QuickBooks Error 12002

• The error could be caused by the firewall or other security software.

• Erroneous SSL settings.

• The PC doesn't have enough storage space.

• The default browser is not set to Internet Explorer.

• Poor connection with the internet could be another cause.

• Incorrect system settings related to the Internet.

Procedure to Fix QuickBooks Error 12002

Solution 1: Change Internet Settings

• Access the Run window and type INETCPL.CPL.

• Press Enter.

• The next step involves setting Medium-High protection.

• Go to the Internet option, followed by Security.

• Click on Connections and choose the LAN settings.

• Checkmark the box to automatically detect settings. 

• Now, uncheck the box beside "Use a proxy server from your LAN".

• Enter correct I.P. and Port and click on Ok.

• Proceed to the Advanced tab.

• Go to Security and click on the option to Use TLS 1.2. 

• Press the Ok button.

Solution 2: Make I.E the Default Browser

• Tap Windows + R keys together.

• Enter the command “INETCPL.CPL” in the Run box.

• Click on "Ok".

• Move on to the Programs tab and choose Internet Explorer as the default browser.

• Run QuickBooks as an administrator.

Solution 3: Update QuickBooks 

• Run QuickBooks as an admin in the No Company Window mode. [Press and hold the Ctrl key]

• The next process requires the user to visit the Help menu.

• Pick “Update QuickBooks Desktop”.

• Now, choose "Update Now."

• Opt for the "Get Updates" option.

• Ensure that you choose "Reset Updates."

• Click "OK" and wait for the downloading to finish.

• Hit on Close.

• Run QuickBooks and hit on “Yes" to install the updates.

Solution 4: Discard QuickBooks in the Firewall

• Click on the "Start" button.

• Enter "firewall".

• Open the Windows Firewall.

• Move on to "Advanced Settings".

• Right-click "Inbound Rules".

• Tap the tab labeled "New Rule."

• Select TCP by clicking on the Port.

• Tap on Next.

• Type in the QuickBooks port.

• For example, for Q.B. 2019, the ports are: “8019, 56728, 55378-55382, 56276, 55368-55372, and 55378-55382.”

• Click on Allow Connection.

• Click on Next.

• Choose each profile from the box that pops up.

• Name the new rule.

• Tap on Next, followed by hitting Enter.

• Repeat the steps for Outbound rules.

Solution 5: Clean Installation of Q.B. Desktop

• Upon clicking on the start menu, access the Control Panel.

• Proceed to Programs and Features.

• Click on QuickBooks and choose Uninstall.

• Now, rename the QuickBooks folder.

• Reinstall QuickBooks.

• Run Q.B. as an administrator.