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Windows 7, though, contains a "SoftAP" feature, also called "virtual Wi-Fi," that allows a single PC to function simultaneously as a Wi-Fi client and as an AP to which other Wi-Fi-capable devices can connect. The capability is handy when users are wearing their consumer hats and want to share music and play interactive games during their off hours. But it also can allow on-site visitors and parking-lot hackers to piggyback onto the user's laptop and "ghost ride" into the corporate network unnoticed.