It's necessary for you to clean and install the application and delete certain items before Troubleshooting QuickBooks POS Error Code 176109. Both of these things will bring in a change in the applications; thus, there are things that you need to do before actually jumping on to troubleshooting, like Creating a backup of your company file so that in case the error is not repaired even after performing the troubleshooting steps, your data still remains safe. So unhide the QuickBooks POS entitlement folder in the windows settings as the folder is hidden, and Updating QBD POS to the latest release are some of the pre-requirements of QuickBooks Error 176109.