After you have configured everything and the Adobe Reader application is already present in the authorized application, tap 5 times on the device’s display and use the password (default “0000”) to access the SureLock Admin settings .
• Click Allowed Applications .
• Now click on the added Adobe Reader > Baby Windows application .

• Uncheck the box for Select All > Check / Enable Adobe Reader 
• Check / enable viewer.ARViewerActivity > Click OK

Now SureLock will block all available options in the Adobe Reader application, except for viewing a PDF file.