Function at 0x40fd93
Capabilities:
Check if file exists
Unmount volume via ioctl

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x1c
push ebx
push esi
push edi
mov edi, dword [ebp + 0xc]
test edi, edi
jne 0x40fdec
push 0xc0000000
push dword [ebp + 8]
call dword [0x4acee0]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x40ff02
push 0x80000000
push dword [ebp + 8]
call dword [0x4acee0]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x40ff02
call dword [sym.imp.KERNEL32.DLL_GetLastError]
cmp eax, 2
jne 0x40fef0
xor eax, eax
inc eax
jmp 0x40ff6e
mov esi, dword [sym.imp.KERNEL32.DLL_lstrlenW]
push edi
call esi
cmp eax, 2
jne 0x40fe06
xor eax, eax
cmp word [edi + 2], 0x3a
sete al
jmp 0x40fe27
push edi
call esi
cmp eax, 3
jne 0x40fe25
lea eax, [edi + 2]
push 0x496c9c
push eax
call fcn.0048040c
neg eax
pop ecx
sbb eax, eax
pop ecx
inc eax
jmp 0x40fe27
xor eax, eax
test eax, eax
je 0x40fe8a
mov eax, dword [ebp + 0xc]
mov ax, word [eax]
mov esi, str.._:
lea edi, [ebp - 0x1c]
movsd dword es:[edi], dword [esi]
movsd dword es:[edi], dword [esi]
movsd dword es:[edi], dword [esi]
push 0
movsw word es:[edi], word [esi]
mov esi, dword [sym.imp.KERNEL32.DLL_CreateFileW]
mov edi, 0x20000000
push edi
push 3
push 0
push 3
mov word [ebp - 0x14], ax
push 0xc0000000
lea eax, [ebp - 0x1c]
push eax
call esi
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x40feff
push 0
push edi
push 3
push 0
push 3
push 0x80000000
lea eax, [ebp - 0x1c]
push eax
call esi
mov edi, dword [ebp + 0xc]
mov ebx, eax
jmp 0x40fdcc
push 0xc0000000
push edi
call dword [0x4acee4]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x40ff02
push 0x80000000
push edi
call dword [0x4acee4]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x40ff02
call dword [sym.imp.KERNEL32.DLL_GetLastError]
dec eax
je 0x40feeb
sub eax, 0x56
je 0x40feeb
sub eax, 0x3a
je 0x40fed8
sub eax, 0x7a
je 0x40fed8
sub eax, 0x101b
je 0x40fed8
push edi
call fcn.0040f6e9
pop ecx
jmp 0x40feeb
push edi
push str.Not_a_mount_point:__1_ws__n
push 0x4ab840
call fcn.0040f68d
add esp, 0xc
push 9
pop eax
jmp 0x40ff6e
push str.Error_opening_device:
call fcn.0040f6e9
pop ecx
push 2
jmp 0x40feed
mov edi, dword [ebp + 0xc]
push ebx
call fcn.0040f73a
test eax, eax
pop ecx
jne 0x40ff11
push 5
jmp 0x40ff64
test byte [ebp + 0x10], 3
mov esi, dword [sym.imp.KERNEL32.DLL_DeviceIoControl]
je 0x40ff73
push ebx
call dword [sym.imp.KERNEL32.DLL_FlushFileBuffers]
xor eax, eax
push eax
lea ecx, [ebp - 4]
push ecx
push eax
push eax
push eax
push eax
push 0x90018
push ebx
call esi
test eax, eax
je 0x40ff52
xor eax, eax
push eax
lea ecx, [ebp - 4]
push ecx
push eax
push eax
push eax
push eax
push 0x90020
push ebx
call esi
test eax, eax
jne 0x40ff73
test edi, edi
jne 0x40ff5b
mov edi, str.Error
push edi
call fcn.0040f6e9
pop ecx
push 2
pop esi
push ebx
call dword [sym.imp.KERNEL32.DLL_CloseHandle]
mov eax, esi
pop edi
pop esi
pop ebx
leave
ret
mov eax, dword [ebp + 0x10]
mov dword [ebp - 0xc], eax
mov eax, dword [ebp + 0x14]
push 0
mov dword [ebp - 8], eax
lea eax, [ebp - 4]
push eax
push 8
lea eax, [ebp - 0xc]
push eax
push 8
push eax
push 0x83722014
push ebx
call esi
test eax, eax
jne 0x40ffa1
push edi
call fcn.0040f6e9
pop ecx
xor esi, esi
cmp dword [ebp - 0xc], esi
je 0x40ff65
push ebx
call dword [sym.imp.KERNEL32.DLL_CloseHandle]
push edi
push str._1_ws_:_Not_all_new_options_were_successfully_changed.
push 0x4ab840
call fcn.0040f68d
add esp, 0xc
push 3
jmp 0x40feed