My pc won't boot up or go into safe mode,??

my work's computer was fine when i turned it off. It now goes to verfying dmi pool data... boot from cd a disk error occurred press ctl, alt, del to restart. When I try to restart, the same things happen. If I try to get into safe mode, it won't let me. The only options I'm getting are on the start up screen and that's F2, F8 and F3....none of which seem to give me any usuable options. Any ideas and help would be great. Thank you in advance

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