Usually this error indicates that the fan inside the computer to keep it cool isn't working correctly. Usually what happens is that the fan isn't spinning at all (the computer can check on the RPM of the fan). If the fan isn't working the computer will give the error and not start up so that heat won't damage any of the internal components.
It is possible that something was blocking the fan and then after moving it around the fan was able to spin again, not causing the error to reoccur. If the error happens again, you can bring it to the helpdesk in the basement of BC to get it repaired. This usually involves the replacement of the fan in the computer.
Hardware Support Specialist