Learn how to troubleshoot Error 1601, 1603, and 1643 when installing or updating QuickBooks.
When installing QuickBooks or doing a product update, one of the following error occurs:
These errors can be caused by a damaged Microsoft Windows Installer or a damaged QuickBooks Desktop installation.
To resolve the error, try one of the following solutions
If you get the error while installing QuickBooks: Repair or reinstall Microsoft .NET Framework.
If you get the error while updating QuickBooks: Reinstall using a clean install. Make sure to use the link from our downloaded page instead of the CD installer.
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