QuickBooks Error 12031 occurs due to network timeout while updating QuickBooks or its payroll services. To fix it, follow these steps:
Check Internet Connection: Ensure you have a stable internet connection.
Update Internet Explorer Settings: Set Internet Explorer as the default browser and verify SSL settings under Tools > Internet Options > Advanced (check SSL 2.0 and SSL 3.0).
Configure Firewall and Security Settings: Allow QuickBooks through the firewall.
Update QuickBooks: Go to Help > Update QuickBooks and retry the update.
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