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An almost unbelievable flaw in Windows 7 beta and Microsoft’s User Account Control (UAC) feature – the one designed to keep all of the annoying messages seen in Vista away from its users – allows its protection to be defeated by any malware which happens to infect the system. The malware needs only to send a series of false keystrokes from a Visual Basic script to activate the UAC dialog, move the slider bar to the disable position, and then save the changes. After that, the program can access protected functions or even reboot the system, thereby gaining full total system access on restart.

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