Do not save to the C: drive of a lab computer. Anything that is saved on the C: drive will be deleted when the computer is restarted. Save to your H: drive, jump drive, or CD. It is best to backup your files and save in two places.
Go the helpdesk (Olin room 102) and report the not working computer. If you are in a lab that is not in the Olin building you can email the helpdesk at or call them at x7293.