Special thanks to Chris & Tekl for their help.
Press Control + Windows Key + m to try...hehe...
Feel free to post any errors faced and suggestions. Cheers, mate(s)!
;By Dominic Tay ;Master Mute ^#m:: Gui,Destroy SoundSet, +1,, mute SoundGet, Master_mute,, mute if Master_mute = On { Gui, Color, 000080 Gui, font, s20 bold cYellow, Tahoma Gui, Add, text,x0 y0, Mute On DetectHiddenWindows on WinWait, %A_ScriptName% ; Set the "last found" window to GUI window. WinSet, TransColor,000080 %transparent% WinSet, AlwaysOnTop, On Gui, -Caption Gui, Show, w200 h50 x10 y705 setenv, presstime, %A_MDay%%A_hour%%A_Min%%A_Sec% envadd, presstime, 2 SetTimer, RemoveGui, On return RemoveGui: setenv, presstime2, %A_MDay%%A_hour%%A_Min%%A_Sec% ifgreaterorequal, presstime2, %presstime% { Gui, Destroy SetTimer, RemoveGui, off } return } else { Gui, Color, 000080 Gui, font, s20 bold cYellow, Tahoma Gui, Add, text,x0 y0 vMyText, Mute Off DetectHiddenWindows on WinWait, %A_ScriptName% ; Set the "last found" window to GUI window. WinSet, TransColor,000080 %transparent% WinSet, AlwaysOnTop, On Gui, -Caption Gui, Show, w200 h50 x10 y705 setenv, presstime, %A_MDay%%A_hour%%A_Min%%A_Sec% envadd, presstime, 2 SetTimer, RemoveGui, On return } return