Bought a new cyberpower pc gma2800bst. Thought it would work online games . Son first download was Rust . Shuts computer down after 10 minutes every time. And then computer will not turn back on with flipping switch in back. Do I try another one and exchange at Best Buy?? Will it happen again? Do I try a different brand and if so which one?? I am a Mon with NO knowledge about gaming PCs !! Help!!