Function at 0x403829
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x3ec
push ebx
push ebp
push esi
push edi
xor ebx, ebx
mov edi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
push 0x8001
mov dword [esp + 0x14], ebx
mov ebp, ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExW]
lea eax, [esp + 0x2c]
xorps xmm0, xmm0
mov dword [esp + 0x40], ebx
push eax
movlpd qword [esp + 0x144], xmm0
mov dword [esp + 0x30], 0x11c
call esi
test eax, eax
jne 0x4038ab
lea eax, [esp + 0x2c]
mov dword [esp + 0x2c], 0x114
push eax
call esi
push 0x53
pop eax
mov dl, 4
mov byte [esp + 0x146], dl
cmp word [esp + 0x40], ax
jne 0x4038a7
mov eax, dword [esp + 0x5a]
add eax, 0xffffffd0
mov word [esp + 0x140], ax
jmp 0x4038b2
xor eax, eax
jmp 0x40389d
mov dl, byte [esp + 0x146]
cmp dword [esp + 0x30], 0xa
jae 0x4038c4
movzx eax, word [esp + 0x38]
mov dword [esp + 0x38], eax
jmp 0x4038c8
mov eax, dword [esp + 0x38]
mov dword [0x435b18], eax
movzx eax, byte [esp + 0x30]
shl ax, 8
movzx ecx, ax
movzx eax, byte [esp + 0x34]
or ecx, eax
movzx eax, byte [esp + 0x140]
shl ax, 8
shl ecx, 0x10
movzx eax, ax
or ecx, eax
movzx eax, dl
or ecx, eax
mov eax, 0x600
mov dword [0x435b1c], ecx
sar ecx, 0x10
cmp cx, ax
je 0x40391d
push ebx
call fcn.00406a13
test eax, eax
je 0x40391d
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.004062cb
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], bl
jne 0x403922
push 0xb
call fcn.00406a13
push 9
call fcn.00406a13
push 7
mov dword [0x434a10], eax
call fcn.00406a13
test eax, eax
je 0x403963
push 0x1e
call eax
test eax, eax
je 0x403963
or byte [0x435b1c], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x2b4
mov dword [0x435a80], eax
lea eax, [esp + 0x150]
push eax
push ebx
push 0x4095d4
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x434a20
call fcn.00406c47
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
push 0x440000
call fcn.00406c47
movzx ecx, word [0x440000]
mov edx, 0x440002
push 0x22
pop esi
push 0x20
pop ebx
cmp cx, si
mov dword [0x434a14], 0x400000
mov eax, esi
mov dword [esp + 0x18], esi
cmovne eax, ebx
movzx eax, ax
push eax
mov eax, 0x440000
cmove eax, edx
push eax
call fcn.00406723
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov ecx, eax
mov dword [esp + 0x14], ecx
movzx eax, word [ecx]
test ax, ax
je 0x403ad7
mov esi, eax
movzx eax, si
cmp si, bx
jne 0x403a17
add ecx, 2
movzx eax, word [ecx]
cmp ax, bx
je 0x403a0c
movzx esi, ax
movzx edx, ax
cmp ax, word [esp + 0x18]
jne 0x403a2d
movzx edx, word [ecx + 2]
push 0x22
pop eax
mov ebx, eax
cmp si, word [esp + 0x18]
lea eax, [ecx + 2]
cmovne eax, ecx
cmp dx, 0x2f
jne 0x403a97
push 0x53
add eax, 2
pop ecx
push 0x20
pop edx
cmp word [eax], cx
jne 0x403a64
movzx ecx, word [eax + 2]
cmp cx, dx
je 0x403a5a
test cx, cx
jne 0x403a64
mov dword [0x435b00], 1
cmp dword [eax], 0x43004e
jne 0x403a86
cmp dword [eax + 4], 0x430052
jne 0x403a86
movzx ecx, word [eax + 8]
cmp cx, dx
je 0x403a83
test cx, cx
jne 0x403a86
or ebp, 4
cmp dword [eax - 4], 0x2f0020
jne 0x403a97
cmp dword [eax], 0x3d0044
je 0x403ac3
push ebx
push eax
call fcn.00406723
mov ecx, eax
push 0x22
pop ebx
movzx eax, word [ecx]
mov edx, eax
cmp ax, bx
jne 0x403ab3
add ecx, 2
movzx edx, word [ecx]
movzx esi, dx
test dx, dx
je 0x403ad7
push 0x20
pop ebx
jmp 0x403a04
xor ecx, ecx
mov word [eax - 4], cx
add eax, 4
push eax
push 0x440800
call fcn.00406c47
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathW]
mov ebx, 0x442800
push ebx
push 0x400
call esi
call fcn.00403dd2
test eax, eax
jne 0x403b49
push 0x3fb
push ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push ebx
call sub.KERNEL32.dll_lstrcatW
call fcn.00403dd2
test eax, eax
jne 0x403b49
push ebx
push 0x3fc
call esi
push 0x4095fc
push ebx
call sub.KERNEL32.dll_lstrcatW
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push ebx
push str.TEMP
call esi
push ebx
push 0x409610
call esi
call fcn.00403dd2
test eax, eax
je 0x403d11
mov ebx, dword [sym.imp.KERNEL32.dll_DeleteFileW]
push 0x442000
call ebx
push ebp
call fcn.0040348f
mov edi, eax
xor ebp, ebp
test edi, edi
jne 0x403d13
cmp dword [0x435a24], ebp
je 0x403bd3
push ebp
push 0x440000
call fcn.00406723
mov esi, eax
mov eax, 0x440000
jmp 0x403b98
cmp dword [esi], 0x5f0020
jne 0x403b95
cmp dword [esi + 4], 0x3d003f
je 0x403b9c
sub esi, 2
cmp esi, eax
jae 0x403b84
mov edi, str.Error_launching_installer
cmp esi, eax
jb 0x403be6
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.00406765
test eax, eax
je 0x403d0d
push esi
push 0x440800
call fcn.00406c47
push esi
push 0x441000
call fcn.00406c47
mov edi, ebp
or dword [0x435b0c], 0xffffffff
call fcn.00405b6b
mov ebx, eax
jmp 0x403d17
call fcn.00406629
push str.nsu
push 0x442800
mov esi, eax
call sub.KERNEL32.dll_lstrcatW
test esi, esi
je 0x403c0f
push 0x409624
push 0x442800
call sub.KERNEL32.dll_lstrcatW
push 0x409628
push 0x442800
call sub.KERNEL32.dll_lstrcatW
push 0x441800
push 0x442800
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403d0d
push 0x442800
test esi, esi
je 0x403c46
call fcn.00405f6b
jmp 0x403c4b
call fcn.00405f4b
push 0x442800
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x440800], bp
jne 0x403c6e
push 0x441800
push 0x440800
call fcn.00406c47
push dword [esp + 0x14]
push section..ndata
call fcn.00406c47
push 0x1a
mov dword [0x436800], 0x41
pop esi
mov eax, dword [0x435a30]
push dword [eax + 0x120]
push 0x42b548
call fcn.00405fe7
push 0x42b548
call ebx
test edi, edi
je 0x403cf6
push 1
push 0x42b548
push 0x443800
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403cf6
push ebp
push 0x42b548
call fcn.0040636a
mov eax, dword [0x435a30]
push dword [eax + 0x124]
push 0x42b548
call fcn.00405fe7
push 0x42b548
call fcn.00406803
test eax, eax
je 0x403cf6
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov edi, ebp
inc word [0x436800]
sub esi, 1
jne 0x403c89
push ebp
push 0x442800
call fcn.0040636a
mov ebx, ebp
jmp 0x403d17
xor ebp, ebp
mov ebx, dword [esp + 0x10]
call fcn.004037e7
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x403d39
push 0x200010
push edi
call fcn.00406bd5
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
cmp dword [0x435af4], 0
je 0x403dbe
lea eax, [esp + 0x14]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x403d8e
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push ebp
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueW]
push ebp
push ebp
push ebp
lea eax, [esp + 0x28]
mov dword [esp + 0x28], 1
push eax
push ebp
push dword [esp + 0x28]
mov dword [esp + 0x40], 2
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406a13
mov esi, 0x80040002
test eax, eax
je 0x403daa
push esi
push 0x25
push ebp
push ebp
push ebp
call eax
test eax, eax
je 0x403db7
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403dbe
push 9
call fcn.00401533
cmp dword [0x435b0c], 0xffffffff
cmovne ebx, dword [0x435b0c]
push ebx
jmp 0x403d33