josie.iannacito2 :
My PC computer doesn'the have an fn key. What do do do if my screen says Fatal System error?
You may want to provide a bit more details. For one, what does not having a Fn key have to do with the error? It's like saying "My car does not have leather seats, what to do if I am out of gas". The two things have nothing to do with each-other.
Start at the beginning, full system specs, where exactly does that error come up? What happened before the issue started, if anything?