Why QuickBooks won't open?

QuickBooks won't open error can be caused by a variety of factors. Some of the reasons have been included here to assist you in determining the specific cause of the problem.

It's possible that your hard disc has been damaged.
Perhaps the company's name is too long.
QuickBooks Desktop was installed incorrectly.
In QuickBooks, the ‘QBWUSER.INI' file is missing.
The issue might also be caused by a damaged OS (Operating System).
The setup of the QuickBooks Desktop isn't always reliable.