I can't install Windows SP1

Hi, I’m trying to play Tower Unite. but I need Microsoft Visual C++ 2015, I try installing it, and it seems I need Windows SP1, I’ve tried installing SP1 thousands of times, it keeps saying failed to install, also my Windows Update can’t find any updates at all, Thank You.

What version of windows are you on

I might be wrong but the version of windows you are on cant support nor download Microsoft Visual C++
It might be to old and cant be downloaded on there

Windows 7.