You might have faced QuickBooks error 1603 when you tried opening or installing QuickBooks desktop on your system. This happens because QB requires some additional files to run but they are unavailable because of Windows incompatible files issue.
You can try to fix the QuickBooks error 1603 by downloading the QuickBooks tool hub. Make sure that you close the QuickBooks desktop. If this doesn’t work then you may proceed with installing the QuickBooks diagnostic tool. It might take some minutes to configure.
Make sure that you use the latest version of Windows and if you are not then kindly update it and try again.