When the installation source for QuickBooks Desktop is unavailable or missing, as frequently happens as a result of faulty installation files or registry problems, QuickBooks Error 1612 appears. Usually, this issue happens when updating or installing a program. It can be fixed by utilizing the QuickBooks Install Diagnostic Tool, fixing the QuickBooks installation, or reinstalling the program. Please call us at +1.833.802.0002 if you want to talk to a QuickBooks support specialist right now.