When updating QuickBooks Desktop, "Error 1601" occurs. The update does not complete.
This error can be caused by:
Important: Ensure that your firewall or antivirus is set properly to allow QuickBooks Desktop components to run on the background. Intuit recommends more than one solution to resolve this issue. For best result, please follow the steps in order shown below.
Restart your computer then try to reinstall the QuickBooks Desktop update. If you are getting the same issue, please proceed to solution 2.
Download, install and run QuickBooks Component Repair tool. Try to reinstall the QuickBooks Desktop update. If you are still getting the same issue, please proceed to solution 3.
By performing a clean installation of QuickBooks Desktop, you are installing QuickBooks Desktop program on a brand new folder on the same default location.