Anti-idle autoit3 script. Use the windows idle timer to figure out the last input event. Useful when VMs don't have focus.

NoSleep.au3

#cs
Copyright (C) March 30, 2015, Andrew Domaszek
(MIT License)
#ce

;#include <MsgBoxConstants.au3>
TraySetIcon ("Shell32.dll", 28)
TraySetToolTip ("Miggle" & @CRLF & "De-idle.")

Func _GetTicksFromGLII()
    Local $LastInputInfo = DllStructCreate("uint;dword")
    DllStructSetData($LastInputInfo, 1, DllStructGetSize($LastInputInfo))
    DllCall("user32.dll", "int", "GetLastInputInfo", "ptr", DllStructGetPtr($LastInputInfo))
	
    Return DllStructGetData($LastInputInfo, 2)
EndFunc   ;==>_GetTicksFromGLII

Func _GetTicksFromGTC()
    Local $aResult = DllCall("Kernel32.dll", "dword", "GetTickCount")
    Return $aResult[0]
EndFunc   ;==>_GetTicksFromGTC

While 1
    Local $iClock, $tiTicks, $mbrc
    $x = MouseGetPos (0)
    $iClock = _GetTicksFromGTC()
    sleep (10000) ; 120000 msec == 2 min
    $Current = MouseGetPos (0)
    $tiTicks = _GetTicksFromGLII();
    
    If $Current = $x And $tiTicks <= $iClock Then
        ;$mbrc = MsgBox($MB_OKCANCEL, "LastMsg", StringFormat("Ticks %d/%d", $iClock, $tiTicks))
        ;If $mbrc = $IDCANCEL Then
        ;   Exit 0
        ;EndIf
        $y = MouseGetPos (1)
        MouseMove ($Current + Random(-20,20,1), $y + Random(-20,20,1), 5)
        MouseMove ($x, $y, 5)
    EndIf
WEnd 

Conveniently not a keylogger.