Well, you can easily get rid of “QuickBooks unable to locate PDF viewer” issue by renaming the Qbprint.qbp File. Below are the steps you need to perform to do so correctly.
Firstly, open the Windows File Manager and click on Organize option in the top left corner.
Now, choose the Folder and search option.
Under the View tab, uncheck Show hidden Files, Folders, or Drives option.
Navigate to the Program Data folder in the C Drive and then open Intuit Folder.
After that, click twice on the QuickBooks folder and hit a right-click on Qbprint.qbp file to open it.
Select Rename and type Qbprint.old.
At last, save the file name and check if you are still getting the QuickBooks Unable to Locate PDF viewer error.