Windows – How to permit cursor to leave left side of screen with dual monitors

This could just be the refresh rate change causing your monitors to do their auto-adjustment. Other than that, I'm not sure what it could be. (This is only comment worthy but alas, I have no reputation here...)

Thanks to @joseppinilla and this script, I wrote this little AHK script which resolves my problem :

#Persistent
CoordMode, Mouse, Screen
SetTimer, Cursor, 100
Return

Cursor:
  MouseGetPos, XPos, YPos
  If (YPos > 1200) {
        ; From 1 to 4
        If (XPos <= 281)  and (XPos > -1) 
        {
            XPos = -4
        }
        ; From 4 to 1
        If (XPos >= -3) and (XPos < 279)
        {
            XPos = 282
        }
        ; From 3 to 1

        If (XPos <= 1922) and (XPos > 1644)
        {
            XPos = 1641
        }
        ; From 1 to 3
        If (XPos >= 1642)  and (XPos < 1920)
        {
            XPos = 1923
        }


        MouseGetPos, nXPos, nYPos
        ;From 1 to 4
        If (nXpos <= 280) and (nXPos >-1) or
        ; From 4 to 1
        (nXPos >= -2)  and (nXPos < 279) or
        ; From 3 to 1
        (nXPos <= 1921) and (nXPos > 1644) or
        ; From 1 to 3
        (nXPos >= 1643)  and (nXPos < 1920)
        {
            MouseMove, %XPos%, %YPos%, 0  
        }
    }
Return 

Some details to understand this tiny script :

• 1200 is the Y position of the top of my Monitor 1
• -1 is the X Position of the Right of my Monitor 4
• 279 is the X position of the Left of my monitor 1
• 1644 is the X position of the right of my monitor 1
• 1920 is the X position of the left of my monitor 3