Computer shuts down....

[Rawiya]

OK so my computer decides to shut down (power button keeps burning yet the screen claims no connection to the computer and all programs I am on go down, indicating it just stops) whenever I run a program in Sandbox. This in general when I run IMVU in there, I will have no other programs running and it just keeps happening which is very annoying since I try and make stuff and lose all of it when my comp does this 'crash'