Fix the QuickBooks Error 15226

Update QuickBooks Desktop

Updating the QuickBooks Desktop software can assist you in overcoming error code 15226 and to keep your software up-to-date you are required to go through the instructions as follows;

💠 First of all close your business file and QuickBooks desktop too.
💠 Make right-click on the QuickBooks Desktop icon that appears on your computer and then you are required to select Run as Administrator.
💠 Click on the Help menu then choose the Update the QuickBooks option and then you have to navigate to the Company Open page.
💠 Here, you will see an option that says ‘mark all’, and later you must press the given ‘Option’ tab.
💠 Now, you have to choose the ‘Save’ option.
💠 Then you are supposed to tap on the Update Now option and after that, you have to click on the ‘Reset Update Box’ option.
💠 From the drop-down menu, you would have to select Receive the update.
💠 Once the update complete notice displays, you must close the QuickBooks program.
💠 You are supposed to restart QuickBooks Desktop if the phrase Install Update appears on your computer screen.
💠 Next, click Yes from the drop-down menu.
💠 At last, after applying all the steps you can restart your computer.

Add the Intuit URL as a Trusted Website

When Intuit is added to your trusted sites list, your browser will be less likely to reject site content. It is necessary to walk through the below-mentioned steps in order to add Intuit URL as a Trusted Website and to eliminate QuickBooks error 15226. 

💠 Open Safari and you are required to type  payroll.intuit.com into the address bar.
💠 Press the Enter tab.
💠 From the drop-down menu, you need to add Bookmark after selecting Bookmarks.
💠 Under the Add this page, Choose the Top Sites option from the drop-down menu.
💠 Add is the option to select.
💠 Navigate to the Customize and Manage Google Chrome icon and select the Settings option.
💠 You are required to click on the Privacy and Security tab on the left side of the window and then click on the Site Settings option. 
💠 Cookies and site data should be selected if it’s possible.
💠 In the allow section, you have to check the box and choose the Add option.
💠 To save, write Intuit.com into the address bar and later click Add.

Install a Digital Signature Certificate

It is noted that Microsoft products are so closely integrated, that you must first import your digital certificate into Internet Explorer (even if you are not using it as your primary browser) before utilizing it in your Microsoft Office products. These instructions are supported with Internet Explorer versions 9 through 11.

💠 A user is required to use the Internet Explorer browser to get started.
💠 Choose Internet Options from the Tools menu on the toolbar. 
💠 In case the toolbar isn’t visible, select Internet Options from the Gear tab in the upper right corner.
💠 Now, you have to hit the Content tab from the drop-down menu.
💠 Then, choose the ‘Certificates’ option from the drop-down menu.
💠 On the Personal Page, tap on the Import option.
💠 Under the Certificate Import Wizard window, press the Next button to begin the process. 
💠 Select Browse from the drop-down menu.
💠 Make sure the button adjacent to “Filename:” entitled “Personal Information Exchange (*.pfx;*.p12)” is selected in the folder where you saved your digital certificate. 
💠 After choosing the filename where you saved the certificate, hit the Open tab.
💠 Make double-check the filename in the Certificate Import Wizard box and then press the Next tab.
💠 In the Password text box, it’s required to type the PIN or password you used to download the certificate, verify the second and third checkboxes and then click the Next button.
💠 Make sure the button next to “Place all certificates in the following store” is chosen, and then Personal is selected in the Certificate Store window.
💠 From the drop-down menu, you need to select the Next tab.
💠 Before clicking the Finish button, properly check your details in the Completing the Certificate Import Wizard box.
💠 Once you’ve completed all the steps appropriately, you will get a notification window. 
💠 After that, click on the OK button from the drop-down menu.
In the Certificates window, your certificate should now appear under the Personal tab.
💠 Tap on the Close button to close the Certificates window.
💠 You would have to first disable the Internet options before clicking the OK tab. 
💠 Now Internet Explorer can recognize your digital certificate. 

Turn off the Firewall and Network Protection Temporary

In Windows 11, while turning off Windows Defender is not permanent, it is only reversible. You simply need to turn off your firewall for a short period and turn it back on when you’re ready. After that return to the screen where you switched off the Firewall and then re-enable it. Here are the steps to reactivate the Firewall on Windows 11;

💠 Navigate to Settings> Privacy and Security> Windows Security> Firewall & Network Protection and then you have to choose the Public Network option.
💠 Now, you are required to enable the Microsoft Defender Firewall by clicking the Toggle.
💠 Once the Toggle is turned on, your Windows 11 Firewall is turned back on.

If you follow this procedure, you will be able to overcome QuickBooks error 15226. In case, the error persists then it is recommended to try the next one.

Uninstall the Reinstall the QuickBooks Desktop

Just because reinstalling QuickBooks Desktop will prompt you with an inaccurate license code, you need to make sure you use the right installer to accept your license code. It is possible to confirm it by logging into your CAMPS account. Let’s have a different way to get your QuickBooks desktop installed assuming you’re using the correct installer.

💠 Verify and set the time and date settings on your computer.
💠 Now close all QuickBooks tasks that are currently active.
💠 You can use QuickBooks Install Diagnostic Tool to debug your installation.
💠 It is recommended that MSXML should be reactivated.
💠 You need to reset the .ecml file. 
💠 Now a user is required to create a new account as Windows Administrator.
💠 Finally, attempt to install QuickBooks Desktop from scratch.