Not seen your problem by colour pink before

  Giggle n' Bits 00:19 25 Sep 2004

but this could be an indication of many things.
VGA cable with damaged wire but this wouldn't cause a system freeze.

Though Graphics struggling may or lack of memory required for a task.

ideally we would need to know your computers specification, which Windows ?, amount of memory, CPU, intergrated graphics or a dedicated graphcis card.

It could just be a one off but if its repetative I would start to look more into it.

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