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Can't write to System32 under Win7 x64

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I simply need to copy a file that disables Adobe Flash auto-update to both - System32 and SYSWOW64 system folders.

FileCopy (@ScriptDir & '\Data\mms.cfg', @WindowsDir & '\SysWow64\Macromed\Flash')
FileCopy (@ScriptDir & '\Data\mms.cfg', @WindowsDir & '\System32\Macromed\Flash')

File doesn't get copied to System32 folder, only to SYSWOW64 (and yes, all directories exist). UAC is off. Any ideas? If I need some special permissions, how do I obtain them via script?

Edit: Doesn't look like a permission issue. Created a copy of "Flash" folder, took ownership of it, and still can't copy there. I'm lost.

Also tried

DllCall("kernel32.dll", "int", "Wow64DisableWow64FsRedirection", "int", 1)

and it doesn't help, either.

Wait, it actually works now. Last time I disabled redirection, I used a wrong system directory variable. Stupid me. :/

Working code:

;Flash Update Disabler
DllCall("kernel32.dll", "int", "Wow64DisableWow64FsRedirection", "int", 1)
FileCopy (@ScriptDir & '\Data\mms.cfg', @WindowsDir & '\System32\Macromed\Flash\mms.cfg', 1) ;Writes to SystemDir on x86, writes to 64-bit SystemDir on x64
FileCopy (@ScriptDir & '\Data\mms.cfg', @WindowsDir & '\SysWow64\Macromed\Flash\mms.cfg', 1) ;Does nothing on x86, writes to 32-bit SystemDir on x64
DllCall("kernel32.dll", "int", "Wow64EnableWow64FsRedirection", "int", 1)
Edited by supraspecies
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