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Generally because of file system redirection, the following may work under 32-bit environment:

#include <AutoItConstants.au3>

Func DiskCleanup($Drive = "C")
    DllCall("kernel32.dll", "boolean", "Wow64EnableWow64FsRedirection", "boolean", 0) ;~ Disable 64 Bit Redirection
        Run("cleanmgr.exe /sageset:12")
    DllCall("kernel32.dll", "boolean", "Wow64EnableWow64FsRedirection", "boolean", 1) ;~ Enable 64 Bit Redirection

More info here: https://www.autoitscript.com/autoit3/docs/libfunctions/_WinAPI_Wow64EnableWow64FsRedirection.htm

Edited by Subz
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@Tekk Thanks for pointing that out, you're correct, I've used that call for years (from within the forums) but never actually bothered to check it it was correct or not.  It should be using int but buggered if I know how to get the old value, from what I've read this can be null or 0 for example:

DllCall("kernel32.dll", "int", "Wow64DisableWow64FsRedirection", "int", 0) ;~ Disable 64 Bit Redirection
DllCall("kernel32.dll", "int", "Wow64RevertWow64FsRedirection", "int", 0) ;~ Enable 64 Bit Redirection


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Subz, in your first example you're confusing Wow64EnableWow64FsRedirection with Wow64DisableWow64FsRedirection, the former uses boolean, the latter uses PVOID (void pointer). You'd want to use the former with True/False to enable/disable the redirection.

Your second example above is using INT when the function is asking for a PVOID, and should be the value obtained from the first function call, if I'm reading the documentation right.

If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
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I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

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It should be more like ..

Global $g_aResult = DllCall("kernel32", "BOOL", "Wow64DisableWow64FsRedirection", "PTR*", 0)

If True = $g_aResult[0] Then

;~  do file stuff here.

    DllCall("kernel32", "BOOLEAN", "Wow64RevertWow64FsRedirection", "BOOLEAN", $g_aResult[1])

Wow64DisableWow64FsRedirection fails for me when I try to call it with an invalid pointer value.

You can see an example of its use  here.

#include <WinAPIFiles.au3>
_WinAPI_Wow64EnableWow64FsRedirection ( $bEnable )

The above is a wrapper for Wow64EnableWow64FsRedirection which is a much more simple approach.  However documentation states "This function may not work reliably when there are nested calls."

I just wanted to bring attention to your posted code failing, at least on my system.  I don't mean to derail the thread.

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Thanks @Tekk & @BrewManNH, for some reason there are a number of variations in the forums, which all appear to work,, @Tekk, using your code I updated my personal UDF, thought I'd share it.

; #FUNCTION# ====================================================================================================================
; Name...........: _DisableWow64FsRedirection
; Description ...: Specifies whether to enable or disable the Wow 64 system folder redirection
; Syntax.........: _DisableWow64FsRedirection([$_bDisable = True])
; Parameters ....: $_bDisable - True  : Disable Wow64 system folder redirection (default)
;                             - False : Re-enable Wow64 System folder redirection
; Return values .: Success    - 1 and @error = 0
;                :            - @extended 1 = Disabled Wow64 system folder redirection
;                :            - @extended 2 = Re-enabled Wow64 system folder redirection
;                  Failure    - 0 and @error = 1
;                :            - @extended 1 = OS 32-bit
;                :            - @extended 2 = Script compiled as 64-bit
; Author ........: Subz
; Modified.......:
; Remarks .......:Thanks Tekk
; Related .......:
; Link ..........:
; Example .......: No
; ===============================================================================================================================
Func _DisableWow64FsRedirection($_bDisable = True)
    If @OSArch = "x64" And @AutoItX64 = 0 Then
        Local $tOldValue = DllStructCreate("dword")
        If $_bDisable = True Then
            DllCall("kernel32.dll", "BOOL", "Wow64DisableWow64FsRedirection", "ptr", DllStructGetPtr($tOldValue))
            Return SetError(0, 1, 1)
            DllCall("kernel32.dll", "BOOL", "Wow64RevertWow64FsRedirection", "ptr", DllStructGetPtr($tOldValue))
            Return SetError(0, 2, 1)
    Local $iError = @OSArch = "x86" ? 1 : 0
        $iError += @AutoItX64 = True ? 2 : 0
    Return SetError(1, $iError, 0)


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