You do not have a "virus" on your machine in the traditional sense; you simply need to revoke the website's permission to send these alerts. For Google Chrome

The message is a common browser notification scam . It is not a real system alert but a deceptive pop-up sent by a website you previously (and likely accidentally) granted permission to send notifications. Why You Are Seeing This

Paste chrome://settings/content/notifications into your address bar. Look for the section.

Identify any website you don't recognize (especially those with weird URLs).