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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

Let me get it straight... I've been having such a great experience with AutoIt, it helped me a lot at my work. And now, I gotta make some configurations in the BIOS of many computers at my work. So, I'd like to know, is it possible to use AutoIt (or some programming language) to write an algorithm that when compiled and transefered to a pen drive, it's "plug and run"?