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Solutions to fix QuickBooks Error Code 12029
Well, you can easily resolve the QuickBooks error 12029 by applying the following solutions. The below-mentioned solutions will surely troubleshoot the error code 12029. We advise you to attempt the solutions one after another to get better results.

Solution 1: Install the Security Certificate

First of all, you are required to click on the QuickBooks icon.
And then, choose Properties.
You need to click on the shortcut tab and select Open File Location.
Click on OK.
After that, you need to choose the Properties option by choosing the QuickBooks.exe file.
Choose QuickBooks and then, select Details in the signature tab.
Choose View Certificate and select Install Certificate.
You are required to set the current under as store location.
Finally, choose Finish and click on OK.

Solution 2: Check the Internet Explorer

Firstly, click on the Security tab and choose the Internet option.
After that, you have to set the Globe icon to medium-high security.
And then, you need to disable the content advisor in the Content option.
Next, choose Never Dial a Connection under the Connection tab.
Click on the LAN setting and then select Automatically detect settings.
Choose OK.
After that, you are required to choose the Restore Advanced setting.
Mark all the boxes TLS 1.0, TLS 1.1, and TLS 1.2.
Keep in mind to unmark the boxes before Use TLS 1.1 and Use TLS 1.2.
Finally, click on OK and open the PC.

Solution 3: Restore the Internet Connection

Firstly, you need to choose the Internet settings.
After that, click on Use my PC’s internet connection.
Next, you need to click on Next & Done.
Finally, you have to wait for completing the update process.

Solution 4: Access the Computer in Administrator Mode

Firstly, you need to choose the Start option.
Choose All Programs.
After that, click on Accessories.
And then, you have a PC to an earlier time.
Choose Next.
Click on system restore point and select Next.
After that, you will receive a confirmation window where you have to select Next.
Finally, reboot the PC.

Solution 5: Correct the Internet Settings

First of all, you have to launch Internet Explorer and click on Tools.
After that, choose Internet Options.
Go to the general tab and select Delete.
Click on the Temporary Internet files and choose Delete.
And then, go to the Connections tab and choose LAN settings.
Next, mark Automatically detect settings.
The proxy server field should be blank and choose OK.
Finally, check that the TLS 1.2, TLS 1.0, and TLS 1.1 boxes are blank.
You May Also Read : How to Fix QuickBooks Error H202?

Solution 6: Organize your Antivirus and Firewall

The first step is to download and install the QuickBooks File Doctor Tool.
After that, click on Save and run the tool.
Next, the file doctor tool starts configuring the Windows Firewall.
You are required to open the firewall ports.

Lastly, you are just left to check whether the error 12029 is appearing.

Solution 7: Verify Errors Associated with Internet Connection

First of all, you need to update your computer to the latest edition.
And then, upgrade QuickBooks.
After that, check dropped internet packets & internet latency.
Then, update and set the Internet Explorer as the default browser.
Check your SSL settings and make sure to mark the TLS 1.2 box.
Now, you need to allow QuickBooks connections to configure the Internet firewall and Internet Security.
Finally, you are left to reboot the PC.

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