1) does the help file load at all pressing F1 from SciTE ?
2) does AutoIt.chm load when open from explorer ?
3) does it load from AutoIt3Help.exe ?
That is a good start for troubleshooting.
Maybe this helps, too:
#include <Array.au3>
Global $hScreen = WinGetHandle("Program Manager")
Global $aScreen_Res = WinGetPos($hScreen)
#cs
$array[0] = X position
$array[1] = Y position
$array[2] = Width
$array[3] = Height
#ce
_ArrayDisplay($aScreen_Res)
Exit
UEZ