Our network has been installed by somebody else who has moved to another state. During a regular anti-virus update (Kaspersky Internet Security), it gave us a "Disk Full" message and the server began to act up and seem to have frozen. When we rebooted the system, we tried to run the Disk Cleanup and that's when we couldn't boot it up anymore. During the initial boot process, it would complete the BIOS routine but then reboot again. Going in to the BIOS set up, the system couldn't "see" the hard drive. I suspect a damaged boot sector. Our network consists of only 3 workstations. Should I do a repair installation? How do I do it?