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QuickBooks Error 12002 typically occurs when there are issues with your internet connection or when QuickBooks is unable to communicate with the server. This error can prevent users from updating QuickBooks or downloading payroll updates. Here are steps to troubleshoot and resolve this issue:

1. Check Your Internet Connection:

   • Ensure your internet is stable and functioning properly. Try accessing other websites to confirm connectivity.

2. Firewall and Antivirus Settings:

   • Your firewall or antivirus may be blocking QuickBooks. Temporarily disable them and check if the error persists. If it resolves the issue, configure your firewall to allow QuickBooks access.

3. Update QuickBooks:

   • Make sure you are using the latest version of QuickBooks. Go to the Help menu and select “Update QuickBooks Desktop.”

4. Use the QuickBooks Connection Diagnostic Tool:

   • This tool can help identify and fix network-related issues. Download it from the Intuit website and follow the instructions.

5. Check System Date and Time:

   • Ensure your computer's date and time settings are accurate. Incorrect settings can cause connectivity problems.

6. Verify SSL Settings:

   • Make sure SSL 2.0 and SSL 3.0 are enabled in your Internet Options. Go to Control Panel > Internet Options > Advanced tab, and check the appropriate boxes.

7. Reset Internet Explorer Settings:

   • If you’re using Internet Explorer, resetting it to default settings can sometimes resolve connectivity issues.

8. Contact Your Internet Service Provider (ISP):

   • If the problem persists, there may be issues with your ISP that need to be addressed.

By following these steps, you should be able to resolve QuickBooks Error 12002 and continue using the software without interruptions. If the issue remains unresolved, consider reaching out to QuickBooks support for further assistance.