I recently took out a case fan from a pc that I'm not currently using into the pc I am using, it worked, then later in the day i was updating windows 7 then one of my brothers turned off the computer, the os crashed but I fixed the problem but now the fan doesn't spin. the fan is a foxconn d80sh-12, it is a 80mm fan that plugs into the motherboard, it has a 3-pin connector. I've tried it on the old pc, it spins right away when tuning on the computer, but it doesn't spin on the one I am using. Thanks.