QuickBooks POS Invalid Product Number- Error 176109


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QuickBooks is one of the most-used accounting software these days. Like every software, there are some errors that a user can face while working on the QuickBooks software. QuickBooks POS invalid product number is one such error. The error code of this problem is 176109. Some people still do not know what to do if they face this error. So keeping this in mind, we have come up with a full article about this error. We have mentioned different ways in which you can resolve this error easily. There are different ways and you can choose one whichever works best for you.

Introduction of POS Invalid Product Number

You might face this error often. You face this error if there is any corruption or correction in your point of sale product key number. You get this error majorly if your product number is missing or maybe your files are corrupted. If you are trying to open QuickBooks point of sale you might have to face this error. There are chances that your QuickBooks software does not have permissions as an administrator or does not have all the permissions that it requires. We have tried to help you to resolve this error in the below sections. Know how can you set up and install the QuickBooks desktop on your system.

How to resolve QuickBooks POS invalid product number error?

QuickBooks error 176109

In this section of this article, we are providing you with all the ways that you can try to resolve the QuickBooks error 176109.

Method 1: You can try to rename the WS activity file

The first method is that you can try to rename the WS activity file. Follow the below steps:

  • In your windows explorer, search your QuickBooks point of sale file. You can find it in your C drive.
  • Go to the WS file and right-click on the file. A menu will open. Look for the rename option.
  • You will be needed to prefix OLD with your WS activity file. 
  • You are required to repeat the same procedure.

Method 2: Remove all the content of the client entitlement folder

error license and product number is invalid

The next method is to remove all the contents that are present in the entitlement client folder. You can do it either manually or automatically. We have mentioned steps for both ways:

Automatically delete content

Follow the steps below:

  • If you want to remove the contents of the client entitlement folder, you will need a clear entitlement tool. You can download it on your system.
  • A zip file will be downloaded. Make sure you unzip the file on the desktop.
  • Once you have unzipped the file, right-click on it to run.
  • You will be required to run the QuickBooks point of sale and register again.
Delete the content manually

If you do not want to download the tool, you can perform the process manually. Follow the below steps:

  • The first step to delete manually is to find the folder using windows explorer. You need to open windows explorer and look for the client entitlement file.
  • You may find it in your C drive in the Intuit folder.
  • Open the client entitlement folder and press the Ctrl key and the A key. It will select all the files present in the folder.
  • Press the shift key and delete key to permanently delete the items.
  • once you are done with it, You are required to again start the QuickBooks point of sale and register again.

Reinstall the QuickBooks point of sale using a clean install

quickbooks pos v18 product number

This is the last solution we have come up with. If you are opting for this option, make sure you make up a back up of your existing files. You can also use QuickBooks clean install tool to reinstall the QuickBooks on your system. know everything about the QuickBooks clean install tool. Follow the below steps.

  • From your control panel, look for the QuickBooks point of sale software.
  • Click on change or uninstall a program. You can then click on the uninstall option.
  • Once it is uninstalled, go to the point of sale folder.
  • You are needed to rename every file or folder present. Prefix old in front of them.
  • Once you are done with this, you will have to install the point of sale software again.
  • The next step is to restore all the backup files that you have created earlier.
  • Lastly, open the software and check if your issue is resolved or not.


This was all about the QuickBooks invalid pos number error. You will be able to solve the error by pursuing ay of the methods that we have mentioned above. In case one method didn’t work for you, you can try another. And if none of these worked for you, contact our QuickBooks Enterprise support team.

Frequently Asked Questions

Q.1 How to find my product number?

To find your product number, you will have to go to the QuickBooks software. Then you have to press key F2. You will see a prompt with all the details of your product like product name, product number, and much other information.

Q.2 Can I change my license number or the product number?

Yes, you can change the license or the product number. In the help section of your QuickBooks software, you will be required to go to the manage license section. There you will see an option to change your license number. Type your new license number and submit it. Once done, you will be able to see a new license number associated with your account.

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