Hello,
I just wana know how to make bat file that can unmute and turn volume on maximum on windows 8.
What commands should I use? ThanksYou would need a 3rd party piece of software and have a MACRO that either performed a hot key combination if laptop it might have a Fn key combination to increase volume, if s desktop you would need someone elses program that calls to the windows audio configuration through an API call I would think.

I am forwarding this to the attention of a programmer who wrote some code a while back that might be of help to you on this. I had a situation where I wanted to have my audio muted for my user account because others on the computer when logging on would set the volume to max and shut off my mute. I would log on after them and have to mute it again. The audio levels are shared among all windows USERS vs user preference per profile, and so you inherit the last logons audio properties even from a different user account. It was frustrating and the work around for me was to shut off the SPEAKERS so audio was off before logging on. Then if I want audio I turn them on. Still this has me and other users fighting it out behind the scenes to where one PERSON is having to turn speakers on and I am having to turn them off. So the power button to speakers is likely to wear or break from daily on and off power to them. The programmer wrote some code that worked with an API for the windows sound audio level.
Possible answer. There is a script for auto hotkey.
http://stackoverflow.com/questions/16290463/can-i-make-a-script-for-a-macro-to-change-volume
But I do not personally know if it works.

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I am forwarding this to the attention of a programmer who wrote some code a while back that might be of help to you on this.