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Kindly check the link which will give you the option to download the Dell Power manager Lite .
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It's not working for my system mine is a vostro 3559 running windows 10 64bit. The link provided is for a inspiron system
"This package provides Dell Power Manager Lite Application and is supported on Inspiron 3458/3558 running the following Operating System: Windows 7 64bit and Windows 8.1 32/64bit."
Thanks for helping me.