Mark Williams

Fixes for invalid product number QuickBooks POS issue

QuickBooks Point of Sale helps retail owners around the world in boosting their sales. The software analyses customer shopping patterns and suggests appropriate discount rates for maximum profit. However, the software might sometimes fail to open after casting an invalid product number QuickBooks POS error message. If you also face trouble opening your QB POS due to this error, keep reading further to learn why POS deals with this issue and the methods to remove it from the software.

Get in touch with a team of QB professionals at 1.855.738.2784 for effective troubleshooting of this error.


You run into this error message when you try opening QB POS on your computer. The reasons QB POS fails to open after casting this error message are mentioned below-

  • Your POS Entitlement folder has some damaged files which fail to run when the software tries to process them.
  • WSActivity file has been quarantined by your security software, or the file has been struck by a virus attack.
  • You entered incorrect license details or product number during software registration.

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Your QB Point of Sale will not open or crash randomly until you fix the registration issue in the software. The methods you can use to make your QB POS error-free are described below in detail-

Solution 1- Delete the corrupt files from the Entitlement Client folder

QB POS saves the files with your registration details and product number in the Entitlement Client folder. QuickBooks Point of Sale will face trouble opening if these launch configuration files get damaged or corrupted. You must remove the files from the folder to ensure the software doesn’t develop issues while running them. You can take help of the Clear Entitlement File tool or delete the files manually as described in the steps below-

  1. Visit the QB website on your web browser and download the Clear Entitlement file tool on your computer.
  2. Open the downloaded files to complete the installation
  3. Let the tool run and open QB POS again to verify your registration details after the tool stops.

You can also remove the files manually, as shown in the steps given below-

  1. Use your file explorer (Windows+E) to go to C:\Program Data\Intuit\Entitlement Client\V8.
  2. Press Ctrl+A simultaneously on your keyboard to mark all the files.
  3. Right-click over the selected files and tap Delete.
  4. Confirm the deletion by pressing Yes.

If QB POS still fails to open, move to the next solution.

Read Also: QuickBooks error 12002

Solution 2- Rename the WSActivity file to recreate it when you open QB POS

QB POS also faces trouble while opening if the WSActivity file becomes unreadable after taking damage. You must recreate the file using the following steps to prevent issues the next time you run QB POS-

  1. Visit C:\Program Data\Intuit\QuickBooks Point of SaleXX\ini in your file explorer.
  2. Right-click on the WSActivity file in the folder and select Rename.
  3. Add ‘OLD’ at the start of the file name.
  4. Save the file and try launching QB POS again.


We have reached the end of this blog describing the reasons for the invalid product number QuickBooks POS message coming up on the screen when you open the software. The methods to address the problem are also given in the blog, which you can use to prevent issues when you open QB POS.

Speak to a QB expert at 1.855.738.2784 if you still face any problems using QB POS.

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