PCが壊れるタイミングは電源投入時と切断時が多いので仕方ないですねー。
これが怖いのでメインマシンとサーバーマシンは24時間つけっぱです。

The timing of PC breakdowns is often when the power is turned on or off, so there's not much one can do. Out of fear of this, I leave my main machine and server machine turned on around the clock.