Bad If you break it off?

I reset my laptop he had Windows 8 but I have to go now and can't complete the process now I can simply pull plug or is that bad then

Let him go, that does not matter.

Just let it on.

off unexpected could be the hard drive damage, as in the process data is written, and when the read / write head in the wrong place is off because of mistakenly data is written there, can it end stupid.

Just leave it to him