Error 1603

o Error Status 1603: The update installer has encountered an internal error.
o Error Status 1603: Unable to apply the patch.
o MSI returned 1603: Fatal error during installation.

Causes for QuickBooks Error Code 1603
o Malware or Virus infection has corrupted the QuickBooks program files or Desktop Windows files.
o Incomplete installation or a corrupt QuickBooks software download.
o Corrupted desktop windows registry from any fresh QuickBooks software modification.
o Any other program maliciously or mistakenly removed the QuickBooks related files.
o Your windows registry does not have a valid entry.
o System shutdown is there because of the Power failure.


Read more:https://www.askforaccounting.com/quickbooks-error-1603-applying-patch/