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Recently, a lot of work has been carried out on the subject of “Green Computing”, which represents an environmentally responsible way for reducing the energy consumption, and also addresses the various environmental related issues, like waste management, greenhouse gases, and so on. Green computing which is also known as sustainable computing also represents the sustainable architecture for software designing and the demand of building sustainable software's is on rise in the global market. This paper proposes an energy sustainable user centric framework for power schemes of operating system to handle the issue of energy consumption by computer system. In comparison to the existing framework of power scheme which is very much operating system oriented and uses the time-out approach of dynamic power management (DPM). The proposed framework is highly user centric and performs the continuous check for user activity on the computer system. This framework implements the three different power saving modes with the help of an algorithm which continuously checks for the power consumption by each runnina processes on the system.