One of the strangest moves made by Microsoft when it comes to Windows 7 security was to create default names for both the Administrator and Guest accounts on every copy of the operating system.

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Rename the Administrator for Better Security in Windows 7
When SSID broadcast is disabled for your wireless router, your wireless network is pretty much in stealth mode.

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Disable SSID Broadcast for Airport Express, Airport Extreme, and Time Capsule Wireless Routers
When SSID broadcast is disabled for your wireless router, your wireless network is pretty much in stealth mode. Meaning, that your wireless network isn’t visible to computer’s that have wireless cards or wireless adapters.

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Disable SSID Broadcast for Airport Express, Airport Extreme, and Time Capsule Wireless Routers
Times Online: Apple tried to silence owner of exploding iPod with gagging order