When I turn on CPU it say Alert covers be removed?

When I turn on CPU it say Alert covers be removed?

did you approachable the case, some cases own alarms
put the cover back!
I have this problem with the antediluvian computer. There was an alert button on the bottom of the covering. I ended up putting cassette over it to make the alarm stop going sour.
Yeah, what they said. Should be able to disable it within BIOS.