Power Plan Manager 2.0 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within System Utilities, more precisely Remote Computing.
The actual developer of the software is Hamilton Engineering. The most popular versions of the software are 2.0, 1.0 and 1.00. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The common filename for the program's installer is powerman.exe.
From the developer:
Let your computer automatically switch between up to four Windows power plans, depending on which applications are currently active. Using energy saving settings in your daily routine power plan helps to lower your electricity bill; at the same time, other power plans can provide maximum performance if needed for critical applications.
You may want to check out more software, such as Easy Power Plan Switcher, Sperry Software - Power Rules Manager or Mz Power Manager, which might be related to Power Plan Manager.
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