Function at 0x43ad20
Capabilities:
Check if file exists
Copy file
Delete file
Get common file path
Move file

Disassembly:
push ebp
mov ebp, esp
mov eax, 0x1008
call fcn.004691e0
mov eax, dword [0x5304cc]
xor eax, ebp
mov dword [ebp - 4], eax
mov eax, dword [ebp + 0x10]
push ebx
mov ebx, dword [ebp + 8]
mov dword [ebp - 0x1008], eax
push esi
mov esi, dword [ebp + 0xc]
push edi
mov edi, ecx
test ebx, ebx
je 0x43aec9
test esi, esi
je 0x43aec9
push 0x800
lea eax, [ebp - 0x1004]
push 0
push eax
call fcn.00475d80
push 0x800
lea eax, [ebp - 0x804]
push 0
push eax
call fcn.00475d80
push 0x400
lea eax, [ebp - 0x1004]
push esi
push eax
call fcn.00492052
add esp, 0x24
lea eax, [ebp - 0x1004]
push eax
call dword [sym.imp.SHLWAPI.dll_PathRemoveFileSpecW]
lea eax, [ebp - 0x1004]
push eax
push 0
call dword [sym.imp.SHELL32.dll_SHCreateDirectory]
push esi
call dword [sym.imp.SHLWAPI.dll_PathFileExistsW]
test eax, eax
je 0x43aea1
push esi
push str.Dest_File_Exist:__s
call fcn.00436400
push esi
call fcn.004087f0
add esp, 0xc
test eax, eax
jne 0x43aea1
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
push esi
push str.Delete_File__s_Failed__error___d
call fcn.00436400
add esp, 0xc
lea eax, [ebp - 0x804]
push eax
push 0
push 0x4ffc30
lea eax, [ebp - 0x1004]
push eax
call dword [sym.imp.KERNEL32.dll_GetTempFileNameW]
lea eax, [ebp - 0x804]
push eax
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
lea eax, [ebp - 0x804]
push eax
push esi
call dword [sym.imp.KERNEL32.dll_MoveFileW]
test eax, eax
je 0x43aede
lea eax, [ebp - 0x804]
push eax
push esi
push str.Rename_File__s_to__s_success
call fcn.00436400
add esp, 0xc
lea eax, [ebp - 0x804]
push 4
push 0
push eax
call dword [sym.imp.KERNEL32.dll_MoveFileExW]
lea eax, [ebp - 0x804]
push eax
push str.delete_by_pending_file:_s
call fcn.00436400
mov eax, dword [ebp - 0x1008]
add esp, 8
test eax, eax
je 0x43ae7a
mov dword [eax], 4
cmp dword [edi + 0x74], 0
jne 0x43aea1
push esi
mov ecx, edi
call fcn.0043a030
test eax, eax
je 0x43aea1
push esi
push str.check_file__s___need_reboot_now
call fcn.00436400
add esp, 8
mov dword [edi + 0x74], 1
push 0
push esi
push ebx
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
jne 0x43af58
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
push esi
push ebx
push str.Copy_From__s_to__s_Failed_Error_Code___d
call fcn.00436400
add esp, 0x10
pop edi
pop esi
xor eax, eax
pop ebx
mov ecx, dword [ebp - 4]
xor ecx, ebp
call fcn.00468d78
mov esp, ebp
pop ebp
ret 0xc
push esi
push str.Rename_File__s_failed__replace_until_reboot
call fcn.00436400
add esp, 8
lea eax, [ebp - 0x804]
push 0
push eax
push ebx
call dword [sym.imp.KERNEL32.dll_CopyFileW]
push 5
push esi
lea eax, [ebp - 0x804]
push eax
call dword [sym.imp.KERNEL32.dll_MoveFileExW]
lea eax, [ebp - 0x804]
push eax
push ebx
push str.copy__s_to__s__replace_until_reboot
call fcn.00436400
mov eax, dword [ebp - 0x1008]
add esp, 0xc
test eax, eax
je 0x43af31
mov dword [eax], 5
cmp dword [edi + 0x74], 0
jne 0x43af58
push esi
mov ecx, edi
call fcn.0043a030
test eax, eax
je 0x43af58
push esi
push str.check_file__s___need_reboot_now
call fcn.00436400
add esp, 8
mov dword [edi + 0x74], 1
mov ecx, dword [ebp - 4]
mov eax, 1
pop edi
pop esi
xor ecx, ebp
pop ebx
call fcn.00468d78
mov esp, ebp
pop ebp
ret 0xc