Yes, I was only talking about Win32 and .NET, which is always bundled in windows (Obviously newer versions of the OS may have newer versions of them).
How C libraries work has never been a problem I have encountered (I do deploy C++ libraries with apps though, and the tendency to move to "all apps deploy a full copy of whatever runtimes they need" is a much better situation for all 3 parties involved (developers, users and hackers...).
I get the point of memset (although that particular example I believe is now an intrinsic).