#Include <WinAPI.au3>
Global Const $SPI_SETMOUSESPEED = 0x0071 ,$SPIF_SENDWININICHANGE = 2
Local $iSlowSpeed=1, $iFastSpeed=20
Global $SpeedOrig = RegRead("HKCU\Control Panel\Mouse", "MouseSensitivity")
_WinAPI_SystemParametersInfo($SPI_SETMOUSESPEED , 0, $iSlowSpeed, $SPIF_SENDWININICHANGE) ; 1 = медленно
Sleep(5000)
_WinAPI_SystemParametersInfo($SPI_SETMOUSESPEED , 0, $iFastSpeed, $SPIF_SENDWININICHANGE) ; 20 = быстро
Sleep(5000)
_WinAPI_SystemParametersInfo($SPI_SETMOUSESPEED , 0, $SpeedOrig, $SPIF_SENDWININICHANGE) ; восстанавливаем оригинальную скорость