Woodcock Washburn LLP
System and method for preserving state data of a personal computer in a standby state in the event of an AC power failure
A mechanism is provided for a personal computer to preserve user and system state data in the event of an AC power failure when the computer is in a standby state. When the AC power failure occurs, a switchover circuit connects a rechargeable energy storage medium, such as a rechargeable battery, to the power supply of the computer for powering components of computer, and the computer is awaken. A critical battery alarm is then issued to trigger the operating system of the computer to perform a transition into a hibernation state, during which the state data of the computer are persistently stored. The energy storage medium is disconnected from the power supply after the computer system has entered hibernation.
Microsoft Corporation
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G06F G06F
inventional inventional
William J. Jason M. Allen Shaun Tony D.
Westerinen Anderson Marshall Wiley Pierce