How To Eliminate QuickBooks invalid product number error
                     Precise ways to counter 
QuickBooks invalid product 
number error
QuickBooks Point of Sale is designed for retail store business owners to help 
them manage the inventory and discount rates to increase profit. 
QuickBooks invalid product number error message can be a reason to 
worry as it won’t allow launching or installing the software. If you victim of this 
QB POS error, read this entire blog to learn why it occurs and the method you 
can use to avoid it in the future.
Get in touch with our team of certified QB professionals for reliable 
troubleshooting of the error.
Primary causes of QuickBooks error 176109
You mainly run into this error code while installing QuickBooks Point of Sale or 
opening the software on your computer. The main reasons for the 
development of this QB POS launch issue are mentioned below-

1. QuickBooks Point of Sale cannot access the license number file due to 
corruption in the Entitlement Client folder or broken file path.
2. QuickBooks POS refuses to open when the WSActivity file gets struck by a 
virus attack and fails to run.
3. Windows Firewall has blocked POS files, causing the software to crash 
randomly while running or malfunction during its launch.
Best countermeasures to use against QuickBooks invalid 
product code or error 176109 in point of sale
You cannot use QB POS on your computer as the error won’t let the software 
start or force it to shut down a few seconds after running. The appropriate 
technique to get rid of the QB POS launch issue is mentioned below-
Solution 1- Install the Clear entitlement tool and delete the contents 
of the Entitlement Client folder
The launch configuration and license file of the QB Point of Sale are stored inside 
the Entitlement Client folder located on your system. The software might display 
this error message if it fails to access its program files during its launch. This 
happens if data corruption occurs in your HDD or a virus attack damages the 
system data. After the files get damaged, you’ll receive an invalid product number 
warning 176109 whenever you install or open the software on your computer. 
You can download the Clear Entitlement file tool to delete the files automatically 
or manually remove them from the system. Both the approaches to counter the 
error are discussed in detail below-
1. Go to the QB website on a browser to download the Clear Entitlement File tool 
on your computer and install it.
2. Open the Clear Entitlement file tool and delete all the folder contents using the 
tool.
3. Launch your QB POS again and follow the instructions on the screen to re-
register the software.
If any issues develop while downloading and using the tool, you can manually 
delete the files as shown in these steps-
1. Launch the file explorer and visit C:\Program Data\Intuit\Entitlement Client\V8 
or V6.
2. Go inside the folder and press Ctrl+A to select all the files.
3. Press the Delete key on the keyboard and click Yes on the screen to confirm 
the file deletion.
After the Entitlement client folder is completely deleted, follow these steps to 
recreate the WSActivity file-
1. Go to C:\Program Data\Intuit\QuickBooks Point of SaleXX\ini on the file 
explorer and right-click the WSActivity file inside.
2. Click the Rename option and type ‘OLD’ before the file name (Beginning).
3. Do not change anything else in the file name, and relaunch QB POS after 
saving the file.
Conclusion
We are now at the completion of this blog explaining the causes of 
QuickBooks invalid product number error message coming up during POS 
installation or launch. The procedure to eliminate the issue is mentioned in the 
blog, and we suggest you use them to prevent issues during POS installation.
Talk to our QB support team at +1-855-738-2784 if the error persists after 
using the technique.