Just two weeks ago, I faced the QuickBooks Error 176109 in my QB Point of Sale. Quickly, I went over the web to find a solution to this issue and sort it out soon through these steps. Check them out.
Go to your C: drive and open the folder of Intuit under the Program Data.
There, you will find a folder named QuickBooks Point of Sale XX (XX is the year of your product).
Open it and rename the WS Activity file by adding the .old extension to it.
Save it and delete the entitlement folder and relaunch the softwar