windows crashes on network connection

windows crashes (Blue screen of death) on network connection
CPU info:
Computer Model: Acer Aspire 5741G
Motherboard:Intel(R) 5 Series/3400 Series Chipset Family PCI Express Root Port 2 - 3B44
Hard Drive 500 GB
Graphics Card: NVIDIA GeForce GT 320M
Firewall:Eset Personal Firewall
Antivirus:ESET Smart Security 4
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can some one help me with this ?:(:confused:

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