I seemed to have collected a bunch of Microsoft Visual C ++ 2XXX Redistributable and Microsoft .NET Framework on my computer. Is it cool for me to uninstall all of the older ones and just keep the newest one?
It's possible that you do, in fact, need all those different versions of .NET - or not. We could go through a exhaustive search to see which programs you have installed might require one version or the other, but in my opinion it's just not worth it. Keep them.