Windows 7 comes with a built in tool with which you can check the energy usage of your laptop and see the recommendations and tips that are provided by the report on how to improve the performance. This is a very helpful energy saving tool in Windows 7. This report is a diagnostic report. Under one single report you are able to view how efficiently you have been utilizing the power. The report also recommends ways in which you can improve your power efficiency. Furthermore, the report also gives warnings when something is not going well. The report can be generated by entering a single command. Follow this step by step tutorial to learn How to generate a power efficiency report for your laptop.