So there was a topic on the General Help and Support board where the poster mentioned it was not easy to check if the system was installed with UEFI or legacy mode and it got me looking down a rabbit hole. Apparently you can't just whip up a simple WMI query to find that out.
But I did find that you can read the output of bcdedit.exe to check if the system is using winload.efi or winload.exe, so then I got stuck because bcdedit doesn't play nice with StdoutRead. Finally I discovered that toggling Wow64DisableWow64FsRedirection would make it all work together.
I hope this helps someone. Maybe it can be simplified, I'm no expert. 🤨
DllCall("kernel32.dll", "int", "Wow64DisableWow64FsRedirection", "int", 1) $aArray = StringSplit(_getDOSOutput("bcdedit.exe"), @CRLF) DllCall("kernel32.dll", "int", "Wow64DisableWow64FsRedirection", "int", 0) For $i = 1 To UBound($aArray) - 1 Select Case StringInStr($aArray[$i], 'Windows Boot Loader') And StringInStr($aArray[$i + 3], 'device partition=C:') And StringInStr($aArray[$i + 4], 'winload.efi') ConsoleWrite("UEFI mode" & @CRLF) Case StringInStr($aArray[$i], 'Windows Boot Loader') And StringInStr($aArray[$i + 3], 'device partition=C:') And StringInStr($aArray[$i + 4], 'winload.exe') ConsoleWrite("Legacy BIOS" & @CRLF) EndSelect Next Func _getDOSOutput($command, $wd = '') ; https://www.autoitscript.com/forum/topic/190249-get-result-of-shellexecute/ Local $text = '', $Pid = Run('"' & @ComSpec & '" /c ' & $command, $wd, @SW_HIDE, 2 + 4) While 1 $text &= StdoutRead($Pid, False, False) If @error Then ExitLoop Sleep(10) WEnd Return StringStripWS($text, 7) EndFunc ;==>_getDOSOutput  

Hi everyone,
Here is my script that does the job of the original BootSectGui. I wrote it because I needed a BootSectGui that works in WinPE x64 environment. The original works only in x86 envoronment. It is free to use, modify and distribute. I coded first in French and then in English, it may have some mistranslation.
In the 7z attached file you have these files:
BootSectGui - original - Main.png    ->  The original Main window of BootSectGui BootSectGui - original - Log.png     ->  The original Log window of BootSectGui BootSectGui - original.exe               ->  The original BooSectGui.exe program BootSectGui_x86_x64.au3              ->  My code BootSectGui_x86.exe                      ->  My program x86 version 1.3 BootSectGui_x64.exe                      ->  My program x64 version 1.3 BootSectGui_x86_x64 1.2.1.au3     ->  My code for 1.2.1 BootSectGui_x86 1.2.1.exe             ->  My program 1.2.1 x86 version
BootSectGui_x64 1.2.1.exe             ->  My program 1.2.1 x64 version BootSectGui_x64 - Main.png          ->  My Main window
BootSectGui_x64 - Log.png            ->  My Log window BootSectGui_x64 - Main 1.2.1.png  ->  My Main window 1.2.1
BootSectGui.psd                             ->  My "code" for the ico files in Photoshop format BootSectGui BSG 64.ico                 ->  The icon used with my program, in 64 dots BootSectGui BSG 256.ico               ->  The same in 256 dots BootSectGui G BS 64.ico                ->  Another icon that looks more like the original one, in 64 dots BootSectGui G BS 256.ico              ->  The same in 256 dots Enjoy!
MDV
Here's the code:
#RequireAdmin #region ;**** Directives created by AutoIt3Wrapper_GUI **** #AutoIt3Wrapper_Icon=BootSectGui BSG 64.ico #AutoIt3Wrapper_Compile_Both=y #AutoIt3Wrapper_UseX64=y #AutoIt3Wrapper_Compression=4 #AutoIt3Wrapper_Res_Comment=New BootSectGui #AutoIt3Wrapper_Res_Description=New BootSectGui that works in WinPE x86 and x64 #AutoIt3Wrapper_Res_Fileversion=1.3 #AutoIt3Wrapper_Res_SaveSource=y #AutoIt3Wrapper_Run_Obfuscator=y #Obfuscator_Parameters=/sf /sv /om /cs=0 /cn=0 #AutoIt3Wrapper_Run_After=del /f /q "%scriptdir%\%scriptfile%_Obfuscated.au3" #endregion ;**** Directives created by AutoIt3Wrapper_GUI **** #cs ---------------------------------------------------------------------------- AutoIt Version: 3.3.8.1 Author: MadDogVachon Script Function: A Gui for BootSect that work in WinPE x64 environment (also in WinPE x86 and Windows x86 x64) Thanks to AZJIO for the improvement of my code! #ce ---------------------------------------------------------------------------- #include <GuiConstantsEx.au3> #include <Constants.au3> #include <GuiEdit.au3> #include <GuiConstantsEx.au3> #include <ComboConstants.au3> #include <WindowsConstants.au3> Opt('MustDeclareVars', 1) Local $Title = "BootSectGui - AutoIt3", $sPathBootSect, $sDriveSelectionItems, $sDriveSelectionFirst, $sBootCode, $sp ; GUI + ID Local $hBootSectGuiMain, $msg, $iSingleDrive, $iAllDrives, $iSYSDrive, $iNT60, $iNT52, $iMBRYesNo, $iForceYesNo, $iDriveSelection, $iBtnWrite, $iQuit If FileExists(@WorkingDir & "\bootsect.exe") Then $sPathBootSect = @WorkingDir & "\bootsect.exe" ElseIf FileExists(@ScriptDir & "\bootsect.exe") Then $sPathBootSect = @ScriptDir & "\bootsect.exe" ElseIf FileExists(@SystemDir & "\bootsect.exe") Then $sPathBootSect = @SystemDir & "\bootsect.exe" ElseIf FileExists(@WindowsDir & "\bootsect.exe") Then $sPathBootSect = @WindowsDir & "\bootsect.exe" Else MsgBox(16 + 262144, $Title, "The necessary 'BootSect.exe' file not found!" & @CRLF & @CRLF & "The program will end now!") Exit EndIf ;Main Menu $hBootSectGuiMain = GUICreate($Title, 525, 175) Local $GuiX = 18, $GuiY = 20 ; Group Drive(s) GUICtrlCreateGroup("Write master boot code into", $GuiX, $GuiY, 189, 130) $iAllDrives = GUICtrlCreateRadio("All Drives", $GuiX + 15, $GuiY + 20, 80) $iSingleDrive = GUICtrlCreateRadio("Single Drive:", $GuiX + 15, $GuiY + 45, 80) GUICtrlSetState(-1, $GUI_CHECKED) ; ================================= $sp = Chr(1) Opt("GUIDataSeparatorChar", $sp) $sDriveSelectionItems = _GetDrv() If Not $sDriveSelectionItems Then ; An error occurred when retrieving the drives. MsgBox(4096, $Title, "Error on querying drives" & @CRLF & @CRLF & "The program will end now!") Exit EndIf $sDriveSelectionFirst = StringRegExp($sDriveSelectionItems, '(?:\A|\001)([C-Z]: Fixed.*?)(?=\001)', 1) If @error Then $sDriveSelectionFirst = StringLeft($sDriveSelectionItems, StringInStr($sDriveSelectionItems & $sp, $sp) - 1) Else $sDriveSelectionFirst = $sDriveSelectionFirst[0] EndIf $iDriveSelection = GUICtrlCreateCombo("", $GuiX + 15, $GuiY + 70, 160, 25, $WS_VSCROLL + $CBS_DROPDOWNLIST) GUICtrlSetFont(-1, -1, -1, 0, "Courier New") GUICtrlSendMsg(-1, 0x160, 370, 0) GUICtrlSetData(-1, $sDriveSelectionItems, $sDriveSelectionFirst) ; ================================= $iSYSDrive = GUICtrlCreateRadio("System Drive", $GuiX + 15, $GuiY + 95, 80) GUICtrlCreateGroup("", -99, -99, 1, 1) ;close group $GuiX += 205 ; Group Windows version GUICtrlCreateGroup("Select master boot code version", $GuiX, $GuiY, 185, 80) $iNT60 = GUICtrlCreateRadio("Windows Vista/7/8 ""/NT60""", $GuiX + 15, $GuiY + 20, 160) GUICtrlSetState(-1, $GUI_CHECKED) $iNT52 = GUICtrlCreateRadio("Windows XP ""/NT52""", $GuiX + 15, $GuiY + 45, 130) GUICtrlCreateGroup("", -99, -99, 1, 1) ;close group $GuiX += 200 ; Group Master Boot Record GUICtrlCreateGroup("Options", $GuiX, $GuiY, 85, 80) $iMBRYesNo = GUICtrlCreateCheckbox("MBR", $GuiX + 15, $GuiY + 20, 60) GUICtrlSetState(-1, $GUI_CHECKED) $iForceYesNo = GUICtrlCreateCheckbox("Force", $GuiX + 15, $GuiY + 45, 60) GUICtrlCreateGroup("", -99, -99, 1, 1) ;close group ; Group Button Local $ButtonX = 18 + 205 + 17, $ButtonY = $GuiY + 95 $iBtnWrite = GUICtrlCreateButton("Write master boot code", $ButtonX, $ButtonY, 150, 40) $iQuit = GUICtrlCreateButton("Quit", $ButtonX + 183, $ButtonY, 85, 40) GUICtrlSetState(-1, $GUI_FOCUS) ; the focus is on this button GUISetState() ; Run the GUI until the dialog is closed While 1 Switch GUIGetMsg() Case $iBtnWrite If GUICtrlRead($iNT60) = $GUI_CHECKED Then $sBootCode = "/NT60" ElseIf GUICtrlRead($iNT52) = $GUI_CHECKED Then $sBootCode = "/NT52" EndIf If GUICtrlRead($iSingleDrive) = $GUI_CHECKED Then BootSectLog(StringLeft(GUICtrlRead($iDriveSelection), 2)) ElseIf GUICtrlRead($iAllDrives) = $GUI_CHECKED Then BootSectLog("All") Else BootSectLog("SYS") EndIf Case $iSingleDrive GUICtrlSetState($iDriveSelection, $GUI_ENABLE) Case $iAllDrives, $iSYSDrive GUICtrlSetState($iDriveSelection, $GUI_DISABLE) Case $GUI_EVENT_CLOSE, $iQuit Exit EndSwitch WEnd Func BootSectLog($sBootSectDrive) Local $hBootSectGuiLog, $iPID, $sBootSectInProgress, $iBootSectLog, $sLine, $iWidth = 530, $iHeight = 330, $iClose, $sMBR, $sForce If GUICtrlRead($iMBRYesNo) = $GUI_CHECKED Then $sMBR = " /mbr" If GUICtrlRead($iForceYesNo) = $GUI_CHECKED Then $sForce = " /force" $iPID = Run(@ComSpec & ' /c "' & $sPathBootSect & '" ' & $sBootCode & " " & $sBootSectDrive & $sMBR & $sForce, @ScriptDir, @SW_HIDE, $STDOUT_CHILD) $sBootSectInProgress = "Executing:" & @CRLF & " Bootsect " & $sBootCode & " " & $sBootSectDrive & $sMBR & $sForce & @CRLF & @CRLF & "--------------------------------------------------------------------------------" GUISetState(@SW_DISABLE, $hBootSectGuiMain) $hBootSectGuiLog = GUICreate("BootSect Log", $iWidth, $iHeight, -1, -1, $WS_CAPTION + $WS_SYSMENU + $WS_POPUP, -1, $hBootSectGuiMain) $iBootSectLog = GUICtrlCreateEdit($sBootSectInProgress, 2, 2, $iWidth, $iHeight - 60) $iClose = GUICtrlCreateButton("Close", $iWidth / 2 - 148, $iHeight - 38, 295, 30) GUICtrlSetState(-1, $GUI_DISABLE) ; Disable "Close" button GUISetState(@SW_SHOW, $hBootSectGuiLog) _GUICtrlEdit_AppendText($iBootSectLog, @CRLF) ; Add space While 1 $sLine = StdoutRead($iPID) If @error Then ExitLoop If $sLine Then _GUICtrlEdit_AppendText($iBootSectLog, @CRLF & $sLine) WEnd _GUICtrlEdit_AppendText($iBootSectLog, @CRLF & "--------------------------------------------------------------------------------" & @CRLF & @CRLF & "Bootsect has terminated itself") GUICtrlSetState($iClose, $GUI_ENABLE) ; Enable "Close" button While 1 $msg = GUIGetMsg() If $msg = $GUI_EVENT_CLOSE Or $msg = $iClose Then GUISetState(@SW_ENABLE, $hBootSectGuiMain) GUIDelete($hBootSectGuiLog) ExitLoop EndIf WEnd EndFunc ;==>BootSectLog Func _GetDrv() Local $sInfo = _ComboListDrive('Fixed') $sInfo &= _ComboListDrive('Removable') Return StringTrimLeft($sInfo, 1) EndFunc ;==>_GetDrv Func _ComboListDrive($Type) ; coded by AZJIO (2013.01.26) Local $aDrive = DriveGetDrive($Type), $list = '', $sString, $sLabel If @error Then Return '' If $Type = 'Removable' Then $Type = 'Rem' For $i = 1 To $aDrive[0] If $aDrive[$i] = 'A:' Then ContinueLoop $sLabel = DriveGetLabel($aDrive[$i]) If StringLen($sLabel) > 15 Then $sLabel = StringLeft($sLabel, 12) & '...' $sString = StringFormat("%-2s %-5s %-15s %-5s ", StringUpper($aDrive[$i]), $Type, $sLabel, _ DriveGetFileSystem($aDrive[$i])) & _GetSize(DriveSpaceTotal($aDrive[$i])) & ' Gb' $list &= $sp & $sString Next Return $list EndFunc ;==>_ComboListDrive Func _GetSize($s) ; coded by AZJIO $s = StringFormat('%.03f', $s / 1024) If StringLen($s) > 7 Then $s = StringRegExpReplace(StringTrimRight($s, 4), '(\A\d{1,3}(?=(\d{3})+\z)|\d{3}(?=\d))', '\1 ') & StringRight($s, 4) Return StringFormat('%9s', $s) ; 9 ???????? EndFunc ;==>_GetSize - - - - -
Edit 1: Corrected mistype in topic title, updated code with JFX recommendation and updated BootSectGui_x64 - Main.png with the new code. Version 1.1
Edit 2: Added /mbr (by default). Corrected the line to execute bootsect.exe using the variable $BootSect. Version 1.1.1
Edit 3: Added /force. Corrected a bug when not founding boosect.exe. Added SYS (system drive) in the list. Updated BootSectGui_x64 - Main.png, BootSectGui_x64 - Log.png and exe files. Version 1.2
Edit 4: Added improvement by AZJIO and updated files. Version 1.3
Edit 5: Little update of code added version 1.2.1 with improvement of AZJIO and a simple list of drives.
BootSectGui_x64.7z

I've been getting reports from manufacturing that some of our applications have been generating an error, such as:

AUTOIT ERROR LINE 1165(X:\windows\system32\program.exe) ERROR: Subscript used w/ non-array variable

Hello everyone. 3 days back, I came across "El Torito" Bootable CD-ROM Format Specification. I was able to write this simple script to extract Boot-Image from a CD/DVD/ISO file. Here is it:


#include <WinAPI.au3> Global $nBytes ConsoleWrite("Boot-Image X-tract (by MKISH)" & @crlf & @crlf & "USAGE: bootext.exe <PATH> <IMGNAME>") If $CmdLine[0] = 0 then Exit If NOT FileExists($CmdLine[1]) then Exit $PATH = $CmdLine[1] $RESULT = $CmdLine[2] $hFile = _WinAPI_CreateFile("." & $PATH, 2,2) $xBuffer = DllStructCreate("byte["& 4 & "]") _WinAPI_SetFilePointer($hFile, 0x11*0x800 + 0x47) _WinAPI_ReadFile($hFile, DllStructGetPtr($xBuffer), 4, $nBytes) $sText1 = DllStructGetData($xBuffer, 1) $dBuffer = DllStructCreate("byte["& 4 & "]") _WinAPI_SetFilePointer($hFile, 0x800 * Int($sText1) + 0x20 + 0x8) _WinAPI_ReadFile($hFile, DllStructGetPtr($dBuffer), 4, $nBytes) $sText2 = DllStructGetData($dBuffer, 1) $fBuffer = DllStructCreate("byte["& 1 & "]") _WinAPI_SetFilePointer($hFile, 0x800 * Int($sText1) + 0x20 + 1) _WinAPI_ReadFile($hFile, DllStructGetPtr($fBuffer), 1, $nBytes) $sTextd = DllStructGetData($fBuffer, 1) $pBuffer = DllStructCreate("byte["& 2 & "]") _WinAPI_SetFilePointer($hFile, 0x800 * Int($sText1) + 0x20 + 0x6) _WinAPI_ReadFile($hFile, DllStructGetPtr($pBuffer), 2, $nBytes) $sText3 = SecCount() $zBuffer = DllStructCreate("byte[" & $sText3 * 0x200 & "]") _WinAPI_SetFilePointer($hFile, 0x800 * Int($sText2)) _WinAPI_ReadFile($hFile, DllStructGetPtr($zBuffer), $sText3 * 0x200, $nBytes) $sText4 = DllStructGetData($zBuffer, 1) FileWrite("" & $RESULT, $sText4) _WinAPI_CloseHandle($hFile) Func SecCount() $fBuffer = DllStructCreate("byte["& 1 & "]") _WinAPI_SetFilePointer($hFile, 0x800 * Int($sText1) + 0x20 + 1) _WinAPI_ReadFile($hFile, DllStructGetPtr($fBuffer), 1, $nBytes) Switch DllStructGetData($fBuffer, 1) Case 0x00 Return Int(DllStructGetData($pBuffer, 1)) Case 0x01 Return Int(0x50 * 0x02 * 0x0F) Case 0x02 Return Int(0x50 * 0x02 * 0x12) Case 0x03 Return Int(0x50 * 0x02 * 0x24) EndSwitch EndFunc
Just compile this as CUI App. Hope it is of use to somebody. Useful suggestions are welcome.

EDIT:
The link is working now. A bugfix