First and foremost, it is vital to remember that if you have repeatedly clicked on the QuickBooks icon, QuickBooks won’t open (double-clicking repeatedly also causes this). It's a good idea to wait a few minutes before restarting QuickBooks. If you want to make numerous requests, don't click multiple times.
Reasons for QuickBooks' failure to reply include:
1) A corrupted hard disc
2) The company's name is too lengthy or broad.
3) QuickBooks Desktop is not installed successfully because it uses an out-of-date operating system.
4) The QBWUSER.INI file is corrupt.