Did you recently install any program/browser extension?
Did you recently allow push notifications?
Did you run Norton Full Scan?
Did you run Malwarebytes Scan?
Browser Protection detections?
Email Protection detections?
Product & version number:
OS details:
Error message?
Supporting screenshots, add them:
How to install and run a scan with Malwarebytes [here]
Norton support via Social Support | Chat | Phone [here ]
Please review: Malwarebytes Help
may be related: https://community.norton.com/t/pdf-phishingx-gen/247945