Quick Troubleshooting for QuickBooks update error 15420

Quick Troubleshooting for QuickBooks update error 15420

QuickBooks update error 15420  is an error of the 15XXX series that appears when downloading the QuickBooks Desktop or the latest payroll tax table update. Because of this, you may not be able to complete the installation of the downloaded update file, or some internet connection error will freeze some features of QB. 


The main reason behind this error is QuickBooks’ failure to verify digital signatures, but there can also be other factors. To get help installing the QB update successfully, follow the guide below. 


This guide contains the possible causes and applicable solutions to rectify the ongoing update error. If you don’t want to handle the technical work alone, we are available to help you. Contact our customer support team by dialing +1(855)-738-0359


Factors that Triggers Update Error 15420 in QuickBooks 


Below, we are mentioning the possible factors that can trigger error 15420 and interrupt the QuickBooks update. Let’s get familiar with these factors: 


  • The QuickBooks installation files are either damaged or corrupted. 

  • QuickBooks isn’t able to verify the digital signature certificate of the company/QB file.

  • You are utilizing an out-of-date QuickBooks version. 

  • Admin user accesses or permissions are not provided to QuickBooks. 


Step-by-Step Solutions to Rectify the QuickBooks Error Code 15420


We are mentioning some solutions below that will help you eliminate error code 15420 and download the update successfully. Follow each step carefully: 


Solution 1: Install the QuickBooks Desktop Again 


Reinstalling QuickBooks will automatically fix the issues with this program. So, follow the below steps carefully. 


Step 1: Uninstall QuickBooks  


  • On the keyboard, click the Windows icon key. 

  • In the search bar of the Windows home screen, type ‘Control Panel’ and click on Open to launch it. 

  • Click ‘Program and Features’ and select ‘Uninstall a Program.’ 

  • Now, a list will open up; from there, select the version of QuickBooks you want to uninstall.  

  • Right-click on the QB file and choose Uninstall.  


Step 2: Install the QuickBooks Again  


  • Now, download the QuickBooks file from Intuit and install it. 

  • When the installation is done, it will automatically create the new folders and give a new name to the old ones



Solution 2: Get the Digital Signature Certificate 


The digital signature certificate authenticates your identity over your transactions and other documents you share online. 


  • Open the ‘File Explorer,’ go to the C drive, and move to the ‘Program Files.’ 

  • Search for QuickBooks’ data file ‘QBW32.exe.’ 

  • You can find the file by simply following the path: ‘CProgramFilesIntuitQuickBooks.’ 

  • Now right-click on the ‘QBW32.exe’ file and select ‘Properties.’ 

  • Further, click on ‘Digital Signature.’ Now verify Intuit is selected in the list. 

  • Click on ‘Details’ to get the certificate on your computer. 

  • Select ‘View Certificate’ from the open ‘Digital Signature Details’ window.

  • Click on the ‘Install Certificate’ button. 

  • When ‘Finish’ is displayed, click ‘Next’ and then ‘Finish.’ 

  • Finally, give a restart to your computer and update QuickBooks.  


Solution 3: Download the QB Update as an Administrator 

Running QuickBooks as an administrator will give you all the admin access you need to make changes on your computer to update the QB or payroll services. 


  • Exit the open company files and then QuickBooks as well. 

  • Now find the QB icon on the computer’s home screen, right-click, and select ‘Run as an Administrator.’ 

  • Click on Yes when asked, ‘Do you want to allow this program to make changes to your computer?‘. 

  • Now, update the QuickBooks Desktop to its newest release. 

We hope the provided solutions are enough to eliminate QuickBooks update error 15420. If the error still occurs, that means QuickBooks has some internal errors. You must consult QB professionals, dial +1(855)-738-0359, and contact our customer support team to fix those errors.