QuickBooks Error 1648: Causes and Solutions. Error 1648 in QuickBooks usually arises due to incomplete installation or conflicts with other applications. It can also occur if QuickBooks can’t find the necessary installation files. To fix it, ensure your software is up-to-date, run the QuickBooks Install Diagnostic Tool, or consider reinstalling QuickBooks if the error persists. https://hackmd.io/@alastormoody/Syd94HhH1g