Why does my toshiba satellite crash randomly?

it happens at random times while i use my laptop, always at ditterant time intervals.

its a fairly new toshiba satellite and i have updated spy ware and virus protection so i dont know whats happening please help. its done it before while i had music playing and the music stuttered and then quit with the screen

the back light is still on though

and the fan and everything else cuts out too, basically everything but the back light and the power light go out

Why does my toshiba satellite crash randomly?computer virus

1) Maybe something's wrong with your power brick unit, check the unit, check your plugs

2) RAM is not seated properly

3) Something is wrong with your hard drive

4) Bad screen power inverter

5) Bad motherboard

2 and 3 are guesses, 1,4, and 5 are more likely.

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