A warning sign with an exclamation mark and a 404 error icon.

404 With Warning Sign

A warning sign with exclamation mark in a triangle.

Exclamation Mark Sign

Two warning icons: an exclamation mark and a cross inside a square.

Three overlapping warning icons, two with Xes and one with an exclamation mark.

Two test tubes with liquid and a warning icon of an exclamation mark inside a triangle.

A silhouette of a round bug with six legs and a skull icon on it, representing danger, a virus or a warning.

A computer screen with a bug search icon and a warning symbol with an exclamation mark.