psu pop

So I had 2 PSUs in a span of a month to make it short, 1 exploded with sparks when i was ingame playing r6 the other made a LOUD pop everytime I switch on my power regulator Was it a coincidence or not? the 1st and 2nd PSU only started to act when i decided to clean out PC and played around...

I know this has been asked tie and time again, but I need an experts opinion on laptops. I'm buying one for my boyfriend for Christmas and don't know what to get because I've never needed anything that could perform past streaming an hd moving while having a couple tabs open. My boyfriend is an...