computer message computer warning screen message screen warning Spyware detected spyware message spyware removal spyware warning bricks floor information sign warn warning wet yellow cutout isolated border descent exclamation red road steep triangle white beware cause comment pipe swim table tablet danger deep instruction lake pond swimming water electricity warning sign careful signs train.trains transport warnings black construction erection protection scaffold scaffolding achtung bend exclamation mark expletive interjection islet mark turn