Error 80070057 has two possible causes. Either someone is attempting to open the company file outside of QuickBooks, or BitDefender (antivirus software) is blocking communication ports between computers. Follow the provided instructions to fix the problem.

Resolve POS error 176125 by using a downloaded utility to clear the issue and then restarting the entitlement client. Information on firewalls is included.

Steps for resolving error 12002, 12007, 12009, 12029, or 12031 errors. These errors are often caused by a network timeout that is preventing QuickBooks from accessing the QuickBooks server, by general Internet connection issues, or by Internet security and firewall software settings.

Use the repair tool linked in the article and, if necessary, repair the Point of Sale installation, verifying the Product Number and License number as you do so.