When a user tries to upgrade the QuickBooks Desktop program or the Payroll function, an error occurs in the application. This occurs when QuickBooks is unable to connect to the internet due to Windows operating system issues and misconfigurations. We've listed every cause of QuickBooks error 12029 down below.
If your internet connection is down or unplugged, there are a few things you may do.
The download of the update file is being interrupted by the Windows Firewall or third-party security apps such as antivirus or anti-malware.
You may have set a different web browser as your default instead of Internet Explorer.