Hi users of Acer products!

I'm writing to you because i've got a... lets say "problem" I'm owner of a Aspire
A515-51G 84NJ (I7 version, MX 150). I'm not an addicted gamer or something like that but after work sometime i play World of Warcraft. Here is my problem, when i use laptop on basic stuff (youtube, facebook, etc.) it works fine even if it's on battery or pluged-in, but when i start play Wow, ****... it's start to electrocute me. Here's the deal: When i play other games like FIFA where mouse is not involved things goes fine. The only time when i recive shocks from him is when i play World Of Warcraft.
I've surfed on several posts on this community about A515-51G models but i don't understand a lot from them...
I'm waitin' for a Acer Staff member to tell me what's wrong with this laptop...
Thanks in advance!