Solution 1: Uncheck the Use Proxy Option in Internet Explorer Settings
- Open Internet Explorer and click on the gear icon to access Internet Options.
- Navigate to the Connections tab.
- Click on LAN settings.
- Uncheck the option that says “Use a proxy server for your LAN.”
- Click OK to apply the changes.
- Start QuickBooks Sync Manager and verify the proxy settings.
Solution 2: Use Third-Party Security Applications
Run a thorough scan of your system using a reliable third-party security application like Norton or McAfee. This step is crucial as the error is likely due to an unknown malware infection. Once the scan identifies and removes any infections, restart your computer and then launch QuickBooks again to see if the error has been resolved.
Solution 3: Reinstall QuickBooks Desktop
If the above solutions do not work, you may need to completely reinstall QuickBooks Desktop. For this, you can use the QuickBooks Clean Install Tool available in the QuickBooks Tool Hub. This process involves uninstalling the existing QuickBooks installation, running the Clean Install Tool, and then reinstalling QuickBooks.
Additional Precautions
To avoid such errors in the future, ensure your system is free of infections like viruses, malware, or Trojans. Regularly running security scans with updated antivirus software can help keep your system clean and reduce the risk of such errors.
If you continue to face issues even after trying these solutions, it may be best to contact QuickBooks support for further assistance. The technical support team can offer more specific guidance based on the unique aspects of your system and QuickBooks setup.