Ways to Fix the Invalid Product Number Error in QuickBooks Point of Sale

What are the Reasons of QuickBooks Error 176109
Some of the reasons of 176109 error:
• Damaged files in the POS entitlement folder
• An incorrect product code has been used during the installation process of Point of Sale.
• When you are not logged into the system as admin.
How to deal with Error: QuickBooks Point Of Sale Invalid Product Number
Steps to deal with QuickBooks Point of Sale Invalid product number. There are two
solutions to this problem. If any of the solutions solves your problem, then you need not try
the another one.
Solution 1: Delete the contents of the Point of Sale entitlement folder and try
For Windows 8:
• Right click on start button and choose File Explorer
• Click on View and check the hidden items check-box
• Go to the left window to C:\Program Data\Intuit\Entitlement Client\v8.
• Select all files and Delete.
• Now, to register yourself, Open point of Sale again and complete the
process.