QuickBooks Error Code 1642: Why It Happens and How to Fix It? When installing or updating QuickBooks, QuickBooks Error Code 1642 arises because of problems with the Windows Installer or corrupted installation files. Frequently, a notification indicating that the installation package or update is invalid appears. Update Windows, repair the QuickBooks installation, then use the QuickBooks Install Diagnostic Tool to resolve the issue. Utilizing QuickBooks support and automation solutions can also improve payroll accuracy and efficiency.If you run into any issues, phone 1.855.738.2784 to speak with a QB support agent. URL :https://accounting-helpline.hashnode.dev/stepwise-troubleshooting-method-to-eliminate-quickbooks-error-code-1642