There are various reasons leading to this error, such as the QuickBooks Desktop Error Code 1904 module flash ocx failing to register can take place to damage in the internal programs and low maintenance of the system. Another cause can be missing or Damaged Microsoft components like MSXML, Microsoft C++, and Microsoft .NET Framework. Other factors include the Windows or QuickBooks desktop that you are using is not updated as per the latest version, and the QB error 1904 can also take place when you have a corrupted Windows Installer.
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