Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
HP Smart Android app shows a prompt window asking user to accept new printer certification. After user tap ‘OK’ or ‘Cancel’, the prompt window shows up again a few seconds later.
Steps to resolve the issue:
What will happen in HP Smart app after ‘Clear data’
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I had the same issue from last 2 weeks, and now I finally found a blogpost, Thank you so much for sharing this helpful guide, It's really help me a lot.