QuickBooks PDF viewer error is caused by corruption of the files related to the Windows print segment. The PDF viewer may not be found by QuickBooks due to corrupted print-related problems. You may consequently run into issues while using the PDF viewer. Such pauses may also be caused by additional reasons, such as a faulty Adobe Reader installation. However, if you implement the proper strategies, you can address the error QuickBooks unable to locate PDF viewer.

Instigators behind QuickBooks Unable to locate PDF Viewer

The most recent updates aren't installed on the QuickBooks Desktop application, which indicates that you may have installed an out-of-date version of Adobe Reader on Windows.

In QuickBooks Desktop, Adobe Reader is not set up as the default PDF viewer.

The installation directory may contain a damaged 'Qbprint.qbp' file, thereby causing the 'unable to locate PDF Viewer' error.

These are the methods you can follow to fix QuickBooks to locate PDF Viewer

Method 1: Edit the QBPrint.qbp File Name

Method 2: Adobe Reader should be the Default Application

Method 3: Reinstall Adobe Acrobat Application

Method 4: Monitor PDF

Method 5: Remove the Temporary Files

Method 6: Resolve the Registry Key on Windows

Source: https://bit.ly/3ogo0nL