Often, the error Quickbooks Won’t Open occurs when attempting to launch the Qb application. The error may appear for several reasons, some of which are:
1. The company name in QuickBooks is longer than needed.
2. The windows operating system is corrupted or damaged.
3. An error arises when installing the QuickBooks software.
4. The company file is damaged or corrupted.
5. Last, the QBWUSER.INI file is corrupted.