My laptop keeps getting blue screen of death (10 points for best answer)?

I am using a Toshiba Satellite E205 with Windows 7 installed, and nearly ever day I suddenly get the blue screen of death, with MEMORY_MANAGEMENT being identified as the problem on the blue screen. Today, it happened and the laptop crashed and it would not start again until I performed system restore. Why is... show more I am using a Toshiba Satellite E205 with Windows 7 installed, and nearly ever day I suddenly get the blue screen of death, with MEMORY_MANAGEMENT being identified as the problem on the blue screen.

Today, it happened and the laptop crashed and it would not start again until I performed system restore.

Why is this problem occuring and what can be done to fix it?
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