Powercfg is a powerful command-line utility in Windows that allows users to manage and configure power settings on their computers. This tool is particularly useful for optimizing power consumption, diagnosing power-related issues, and configuring power schemes. Powercfg can be executed via the Command Prompt (CMD) and offers a variety of options to control power settings efficiently.

Examples:

1. View Available Power Schemes:

   To list all available power schemes on your Windows system, open the Command Prompt and type:

   powercfg /list

   This command will display a list of all power schemes, including the active one, along with their unique GUIDs.

2. Change the Active Power Scheme:

   If you want to change the active power scheme to a different one, use the following command with the GUID of the desired power scheme:

   powercfg /setactive <GUID>

   Replace <GUID> with the actual GUID of the power scheme you want to activate.

3. Create a New Power Scheme:

   To create a new power scheme based on an existing one, use the following command:

   powercfg /duplicatescheme <Existing-GUID>

   This will create a new power scheme that is a duplicate of the specified existing scheme. You can then modify this new scheme as needed.

4. Export and Import Power Schemes:

   You can export a power scheme to a file and import it on another system. To export, use:

   powercfg /export <filename> <GUID>

   To import a power scheme, use:

   powercfg /import <filename>

5. Generate a Power Efficiency Diagnostics Report:

   To generate a detailed power efficiency diagnostics report, use the following command:

   powercfg /energy

   This command will analyze the system's power efficiency and generate a report in the form of an HTML file, typically saved in the system's root directory.

6. Disable Hibernation:

   If you wish to disable hibernation to save disk space, execute:

   powercfg /hibernate off

   To enable hibernation again, simply use:

   powercfg /hibernate on

These examples illustrate just a few of the many capabilities of the Powercfg utility. It is a versatile tool that can help optimize power usage and troubleshoot power-related issues on Windows systems.