You can't overide it and we can't help you because we can't be sure we wouldn't assist in breaking into someone else's system.
If it's a BIOS or Supervisor password, go to the manufacturer and provide positive proof of ownership and they might help. Another workaround would be to use a new WIndows operatiing system disk to format and install over the top of the existing system, instead of the Factory Restore setting. Windows disks vary in price but those on e-Bay are often couterfeit or already in use elsewhere.