What does "system disc reading error" mean?

thats exactly what my laptop says each time i transform it on.& below that is says “press alt+ctrl+del that will restart” & plainly do press those buttons it will say a similar.so how do i fix that & i have HP pavilion upon vista 64 little bit.

10 items for optimum solution:)

it means you’ve got bad sectors against your hard push that can not be read it requires a total format.