# Best Ways to Fix QuickBooks Invalid Product Number Error ![Best Ways to Fix QuickBooks Invalid Product Number Error](https://hackmd.io/_uploads/BkoYQukLZg.png) <p>QuickBooks Point of Sale is used by retail store owners worldwide to record sales transactions and analyze customer shopping patterns to maximize sales. However, the <strong>QuickBooks Invalid Product Number</strong> error may sometimes appear while registering the software. If you encounter this error message in your QB POS, keep reading to understand why it occurs and the different ways to resolve it on your PC.</p><!-- wp:paragraph --> <!-- /wp:paragraph --> <!-- wp:paragraph --> <p><strong><em></em></strong></p><blockquote><strong><em>Approach our QB Support team at 1.855.738.2784 for troubleshooting guidance to fix this issue.</em></strong></blockquote><p></p> <!-- /wp:paragraph --> <!-- wp:heading --> <h2 class="wp-block-heading">Why QuickBooks Fails to Open Due to This Error?</h2> <!-- /wp:heading --> <!-- wp:paragraph --> <p>You may encounter an Invalid Product Number (POS) warning while opening or installing the software on your computer. This error prevents you from using QuickBooks Point of Sale and can occur due to the following reasons:</p> <!-- /wp:paragraph --> <!-- wp:list {"ordered":true} --> <ol class="wp-block-list"><!-- wp:list-item --> <li>The files in the Entitlement Client folder are damaged, causing POS to fail to read the license number file.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>The WSActivity file is corrupted due to a virus attack or data corruption, preventing it from running in QuickBooks POS.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>QuickBooks POS is blocked by Windows Firewall or cannot access the required program files because you are using a non-administrator Windows account.</li> <!-- /wp:list-item --></ol> <!-- /wp:list --> <!-- wp:paragraph {"align":"center"} --> <p class="has-text-align-center" style="text-align: center;"><strong><em>Also Recommended: <a href="https://blog.accountinghelpline.com/quickbooks-desktop-issues/quickbooks-error-h202/">What is Error Code H202 in QuickBooks?</a></em></strong></p> <!-- /wp:paragraph --> <!-- wp:heading --> <h2 class="wp-block-heading">Actions needed to get rid of the QB POS issue</h2> <!-- /wp:heading --> <!-- wp:paragraph --> <p>You may be unable to install or open QB POS on your system once the software is affected by this startup issue. To resolve the problem and restore proper functionality, follow the methods below to eliminate the issue from your QB POS.</p> <!-- /wp:paragraph --> <!-- wp:heading {"level":3} --> <h3 class="wp-block-heading">Solution 1 – Delete all the files inside the Entitlement Client folder</h3> <!-- /wp:heading --> <!-- wp:paragraph --> <p>QB POS stores its launch configuration and license files in the Entitlement Client folder on your system. If this folder becomes damaged due to data corruption and the files fail to run properly, you may encounter the invalid product number error 176109 while installing or opening the software. You can resolve this issue by deleting the files in the Entitlement Client folder, as they will be automatically recreated the next time you run the software. You can perform this process either by using an automated tool or manually, as outlined in the steps below.</p> <!-- /wp:paragraph --> <!-- wp:list {"ordered":true} --> <ol class="wp-block-list"><!-- wp:list-item --> <li>Download and install the Clear Entitlement File tool on your computer.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>Run the tool and allow it to delete the files inside the Entitlement Client folder.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>Reopen QB POS and follow the on-screen instructions to register the software.</li> <!-- /wp:list-item --></ol> <!-- /wp:list --> <!-- wp:paragraph --> <p>Alternatively, you can delete the files manually using the steps below:</p> <!-- /wp:paragraph --> <!-- wp:list {"ordered":true} --> <ol class="wp-block-list"><!-- wp:list-item --> <li>Open File Explorer and navigate to <code>C:\Program Data\Intuit\Entitlement Client\V8</code> or <code>V6</code> on your system.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>Select all the files inside the folder (Ctrl + A), then right-click anywhere in the selected area.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>Click <strong>Delete</strong> and select <strong>Yes</strong> in the confirmation prompt.</li> <!-- /wp:list-item --></ol> <!-- /wp:list --> <!-- wp:paragraph --> <p>If the QB POS error persists, proceed to the next solution.</p> <!-- /wp:paragraph --> <!-- wp:heading {"level":3} --> <h3 class="wp-block-heading">Solution 2 – Recreate the WSActivity File Stored in the POS Folder</h3> <!-- /wp:heading --> <!-- wp:paragraph --> <p>You may encounter QuickBooks POS Error 176109 if the WSActivity file becomes damaged and the software is unable to process it. In such cases, recreating the corrupted file can resolve the issue. Follow the steps below to do so:</p> <!-- /wp:paragraph --> <!-- wp:list {"ordered":true} --> <ol class="wp-block-list"><!-- wp:list-item --> <li>Open File Explorer and navigate to <code>C:\ProgramData\Intuit\QuickBooks Point of SaleXX\ini</code>.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>Right-click the <strong>WSActivity</strong> file and select <strong>Rename</strong>.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>Add <strong>“OLD”</strong> at the beginning of the file name without making any other changes.</li> <!-- /wp:list-item --> <!-- wp:list-item --> <li>Delete the files inside the <strong>Entitlement Client</strong> folder once again.</li> <!-- /wp:list-item --></ol> <!-- /wp:list --> <!-- wp:heading --> <h2 class="wp-block-heading">Conclusion</h2> <!-- /wp:heading --> <!-- wp:paragraph --> <p>This brings us to the end of the blog, where we explained why the <strong>QuickBooks Invalid Product Number</strong> error prevents you from setting up POS on your PC. We have outlined the necessary methods to help prevent this error and ensure a smooth POS registration process. We hope these solutions help you resolve the issue without difficulty. If the steps seem too complex to apply, you can contact our QB support team directly at <strong>1.855.738.2784</strong> for expert assistance.</p> <!-- /wp:paragraph --> <!-- wp:paragraph {"align":"center"} --> <p class="has-text-align-center" style="text-align: center;"><strong><em>Source URL: <a href="https://www.blogandjournal.com/best-ways-to-resolve-quickbooks-invalid-product-number-error/">https://www.blogandjournal.com/best-ways-to-resolve-quickbooks-invalid-product-number-error/</a></em></strong></p> <!-- /wp:paragraph --> <!-- wp:paragraph --> <p></p> <!-- /wp:paragraph -->