Function at 0x42aff5
Capabilities:
Check if file exists
Delete file
Get common file path
Get file attributes

Disassembly:
mov eax, 0x4485ba
call fcn.004312c8
sub esp, 0x4b8
push ebx
push esi
push edi
mov al, byte [ebp + 0x33]
xor ebx, ebx
mov dword [ebp - 4], ebx
mov byte [ebp - 0x20], al
mov dword [ebp - 0x1c], ebx
mov dword [ebp - 0x18], ebx
mov dword [ebp - 0x14], ebx
lea eax, [ebp - 0x20]
lea ecx, [ebp + 8]
push eax
push 0x3b
mov byte [ebp - 4], 1
call fcn.0041dc3d
mov ecx, dword [ebp - 0x1c]
cmp ecx, ebx
je 0x42b09f
mov eax, dword [ebp - 0x18]
push 0x28
sub eax, ecx
pop esi
cdq
idiv esi
mov edi, 0x4494c4
mov esi, 0x4494bc
cmp eax, 3
jne 0x42b089
lea eax, [ebp - 0xd]
push ebx
push eax
push 0x45d464
lea ecx, [ebp - 0x5c]
mov dword [ebp - 0x5c], edi
mov dword [ebp - 0x3c], esi
call fcn.0040856d
lea eax, [ebp - 0x5c]
lea ecx, [ebp - 0x20]
push eax
mov byte [ebp - 4], 2
push dword [ebp - 0x18]
call fcn.00421100
lea ecx, [ebp - 0x5c]
mov byte [ebp - 4], 1
call fcn.00401929
mov ecx, dword [ebp - 0x1c]
cmp ecx, ebx
je 0x42b09f
mov eax, dword [ebp - 0x18]
push 0x28
sub eax, ecx
pop ebx
cdq
idiv ebx
cmp eax, 4
je 0x42b0a7
xor ebx, ebx
push 0xfffffffffffffffc
pop esi
jmp 0x42b2e1
mov ecx, dword [ecx + 0x30]
xor ebx, ebx
cmp ecx, ebx
jne 0x42b0b5
mov ecx, 0x4494dc
push ecx
call fcn.00432233
mov dword [ebp - 0x30], eax
mov eax, dword [ebp - 0x1c]
pop ecx
mov eax, dword [eax + 0x58]
cmp eax, ebx
jne 0x42b0ce
mov eax, 0x4494dc
push eax
call fcn.00432233
mov dword [ebp - 0x34], eax
lea eax, [ebp - 0x88]
push eax
call fcn.0040b886
pop ecx
pop ecx
mov eax, dword [ebp - 0x80]
mov byte [ebp - 4], 3
cmp eax, ebx
mov byte [ebp - 0xd], bl
jne 0x42b0f8
mov eax, 0x44952c
push eax
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
cmp eax, 0xffffffff
jne 0x42b22e
lea eax, [ebp - 0xe]
push ebx
push eax
lea ecx, [ebp - 0x5c]
mov dword [ebp - 0x5c], edi
mov dword [ebp - 0x3c], esi
call fcn.00401586
mov esi, 0x104
lea eax, [ebp - 0x2c]
push esi
push eax
lea ecx, [ebp - 0x5c]
mov byte [ebp - 4], 4
call fcn.0040865e
mov ecx, dword [eax]
mov byte [ebp - 4], 5
mov byte [eax + 4], 1
call fcn.00408609
push dword [eax]
push esi
call dword [sym.imp.KERNEL32.dll_GetTempPathW]
lea ecx, [ebp - 0x2c]
mov byte [ebp - 4], 4
call fcn.0040868b
lea eax, [ebp - 0x2c]
push esi
push eax
lea ecx, [ebp - 0x88]
call fcn.004020e2
mov ecx, dword [eax]
mov byte [ebp - 4], 6
mov byte [eax + 4], 1
call fcn.0040276f
mov ecx, dword [ebp - 0x54]
mov eax, dword [eax]
cmp ecx, ebx
jne 0x42b182
mov ecx, 0x4494dc
push eax
push ebx
push 0x459820
push ecx
call dword [sym.imp.KERNEL32.dll_GetTempFileNameW]
lea ecx, [ebp - 0x2c]
mov byte [ebp - 4], 4
call fcn.004021f4
lea eax, [ebp - 0x4c4]
push esi
push eax
push dword [0x4623e4]
call dword [sym.imp.KERNEL32.dll_GetModuleFileNameW]
lea eax, [ebp - 0x4c4]
lea ecx, [ebp - 0x2bc]
push eax
call fcn.0042b660
mov eax, dword [ebp - 0x80]
mov byte [ebp - 4], 7
cmp eax, ebx
jne 0x42b1d2
mov eax, 0x44952c
push ebx
push eax
push str.ISSetup.dll
lea ecx, [ebp - 0x2bc]
call fcn.0042bee8
cmp eax, 1
je 0x42b20f
cmp dword [ebp - 0x6c], ebx
mov esi, dword [0x44950c]
je 0x42b200
push dword [ebp - 0x6c]
call dword [sym.imp.OLEAUT32.dll_SysStringLen]
mov dword [ebp - 0x6c], ebx
push esi
push ebx
lea ecx, [ebp - 0x84]
call fcn.00404776
jmp 0x42b213
mov byte [ebp - 0xd], 1
lea ecx, [ebp - 0x2bc]
mov byte [ebp - 4], 4
call fcn.0042bca0
lea ecx, [ebp - 0x5c]
mov byte [ebp - 4], 3
call fcn.00401929
cmp dword [ebp - 0x7c], ebx
mov esi, 0x1b59
je 0x42b28f
lea eax, [ebp - 0x88]
lea ecx, [ebp - 0x60]
push eax
call fcn.0040b753
lea ecx, [ebp - 0x60]
mov byte [ebp - 4], 8
call fcn.0040b9c0
test eax, eax
jne 0x42b26b
mov esi, dword [0x4623d8]
lea ecx, [ebp - 0x60]
mov byte [ebp - 4], 3
call fcn.0040b863
jmp 0x42b2d2
mov eax, dword [ebp - 0x1c]
lea ecx, [eax + 0x78]
push ecx
lea ecx, [ebp - 0x60]
push dword [ebp - 0x34]
push dword [ebp - 0x30]
push eax
call fcn.0040c014
lea ecx, [ebp - 0x60]
mov esi, eax
mov byte [ebp - 4], 3
call fcn.0040b863
cmp byte [ebp - 0xd], bl
je 0x42b2a7
mov eax, dword [ebp - 0x80]
cmp eax, ebx
jne 0x42b2a0
mov eax, 0x44952c
push eax
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp byte [ebp + 0x30], bl
je 0x42b2d2
lea ecx, [ebp - 0x2c]
call fcn.00401986
push dword [0x4623e4]
lea ecx, [ebp - 0x2c]
mov byte [ebp - 4], 9
call fcn.004019ba
lea ecx, [ebp - 0x2c]
mov byte [ebp - 4], 3
call fcn.004019b3
lea ecx, [ebp - 0x88]
mov byte [ebp - 4], 1
call fcn.00401cce
lea ecx, [ebp - 0x20]
mov byte [ebp - 4], bl
call fcn.0041e1dc
or dword [ebp - 4], 0xffffffff
lea ecx, [ebp + 8]
call fcn.00401929
mov ecx, dword [ebp - 0xc]
mov eax, esi
pop edi
pop esi
pop ebx
mov dword fs:[0], ecx
leave
ret