Function at 0x40fecb
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 0x40ff24
push 0xc0000000
push dword [ebp + 8]
call dword [0x4a6ed8]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x41003a
push 0x80000000
push dword [ebp + 8]
call dword [0x4a6ed8]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x41003a
call dword [sym.imp.KERNEL32.dll_GetLastError]
cmp eax, 2
jne 0x410028
xor eax, eax
inc eax
jmp 0x4100a6
mov esi, dword [sym.imp.KERNEL32.dll_lstrlenW]
push edi
call esi
cmp eax, 2
jne 0x40ff3e
xor eax, eax
cmp word [edi + 2], 0x3a
sete al
jmp 0x40ff5f
push edi
call esi
cmp eax, 3
jne 0x40ff5d
lea eax, [edi + 2]
push 0x491708
push eax
call fcn.0047bf2c
neg eax
pop ecx
sbb eax, eax
pop ecx
inc eax
jmp 0x40ff5f
xor eax, eax
test eax, eax
je 0x40ffc2
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 0x410037
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 0x40ff04
push 0xc0000000
push edi
call dword [0x4a6edc]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x41003a
push 0x80000000
push edi
call dword [0x4a6edc]
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x41003a
call dword [sym.imp.KERNEL32.dll_GetLastError]
dec eax
je 0x410023
sub eax, 0x56
je 0x410023
sub eax, 0x3a
je 0x410010
sub eax, 0x7a
je 0x410010
sub eax, 0x101b
je 0x410010
push edi
call fcn.0040f433
pop ecx
jmp 0x410023
push edi
push str.Not_a_mount_point:__1_ws__n
push 0x4a5840
call fcn.0040f3d7
add esp, 0xc
push 9
pop eax
jmp 0x4100a6
push str.Error_opening_device:
call fcn.0040f433
pop ecx
push 2
jmp 0x410025
mov edi, dword [ebp + 0xc]
push ebx
call fcn.0040f484
test eax, eax
pop ecx
jne 0x410049
push 5
jmp 0x41009c
test byte [ebp + 0x10], 3
mov esi, dword [sym.imp.KERNEL32.dll_DeviceIoControl]
je 0x4100ab
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 0x41008a
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 0x4100ab
test edi, edi
jne 0x410093
mov edi, str.Error
push edi
call fcn.0040f433
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 0x4100d9
push edi
call fcn.0040f433
pop ecx
xor esi, esi
cmp dword [ebp - 0xc], esi
je 0x41009d
push ebx
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push edi
push str._1_ws_:_Not_all_new_options_were_successfully_changed.
push 0x4a5840
call fcn.0040f3d7
add esp, 0xc
push 3
jmp 0x410025