QuickBooks POS – Invalid Product Number: Error 176109

Solution 1: Delete the contents of the entitlement client folder

  1. Using Windows Explorer, navigate to: C:\Program Data\Intuit\Entitlement Client\v8.
  2. Press the CTRL+A on your keyboard to select all the files in the folder, then press Delete.
  3. Select Yes to confirm the action.
  4. Relaunch QuickBooks Desktop Point of Sale and re-register the application.

Solution 2: Rename the WSActivity file

  1. Using Windows Explorer, navigate to: C:\Program Data\Intuit\QuickBooks Point of Sale XX\Ini
  2. Right-click WSActivity and select Rename.
  3. Enter OLDWSActivity and click anywhere to save.
  4. Close the window then delete the entitlement again.
  5. Relaunch QuickBooks Desktop Point of Sale.
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