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How to diagnose and fix Windows Vista crash on laptop

I have a Compaq Presario CQ50, and sometimes when I am using it the system crashes with a black screen. The only way to recover is with a reboot using a button on the laptop (not via software of ...
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diagnostic software for wifi adapter

I'm having trouble with my wifi connection. Is there any software out there that can help me determine if the problem is in the drivers or in the hardware? Regretfully, I'm working on Vista Edit: ...