My computer keeps crashing when I try to play a game using dolphin v 4.2

[Shonumi]

The amount of money you spent is completely irrelevant, not only because it doesn't always translate into how well Dolphin will perform on a system (e.g. Macs are generally expensive, but usually offer low-mid range performance) it also has nothing to do with following forums rules which dictate that you provide us with info like your system specs, the games you're trying to play, and your settings. Please provide them before posting again, since we really can't help you without knowing more than what you've already told us.