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.

QuickBooks POS Firewall Settings

Configure Windows firewall

  1. On your keyboard, press Windows+R to open the run command.
  2. Type in control, then click OK to open the Control Panel.
  3. Set the “view by” to Small Icons, then select Windows Firewall.
  4. Select Advanced Settings, then choose Inbound.
  5. Click New Rule.
  6. Select Port, then click Next.
  7. Enter the port numbers, then click Next (See Point of Sale Firewall Ports section).
  8. Select Allow Connection, then choose Next.
  9. Name your firewall rule (e.g. POS), then click Finish
  10. Follow steps 5-9 to create a new Outbound Rule.

Point of Sale Firewall Ports

PORTPORT NUMBERS
TCP
(Incoming)
8040, 8443, 8036, 8035, 8025, 8024, 46228, 46225, 46216-46220, 46203, 46204, 2638, 443
UDP
(Outgoing)
8036, 8035, 8024, 2638
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