When you open QuickBooks Point of Sale for Desktop, you see or receive the following error message:
The fo possible causes for this message:
Intuit recommends the following solutions for this problem. The first solution may solve your problem, or you may need to try all to resolve the issue. For best results, perform the solutions in the order shown.
Important: Ensure that hidden files and folders are displayed, before proceeding to this solution.
Navigate on the left window to the location below that is appropriate to your QuickBooks Point of Sale for Desktop version and rename the Entitlement folder.
Windows 10, 8.1, 8, 7 and Vista: C:\ProgramData\Intuit\Entitlement Client\v(x.x)
If repairing QuickBooks Point of Sale for Desktop does not work or resolve your issue, you will need to perform a clean install of POS.