Virus Infection Notification

This is a common recent case. A virus infection warning appears in the bottom-right corner of the computer screen.

Even when this notification appears, based on experience, most computers are not actually infected with viruses.
Those who create viruses embed them in computers in ways that are difficult for users to detect.
They do not go out of their way to kindly inform you that your computer has a virus.
The reason this notification appears is often due to clicking 'Allow Notifications' on a pop-up while browsing various websites without paying much attention.
The notification feature of your internet browser becomes enabled, causing these messages to appear.
If you disable the notification feature in your browser settings, they will stop appearing.