Non-sucking Win32 C compiler

I need a small (not bloated to hell, clean, not system ruining / service installing) compiler for tiny C programs with POSIX-like semantics (i.e. C library that doesn't suck and stuff like read() instead of ReadFileWEX(WHANDLE, WSHARINGMODE, WSECURITYCONTEXT, NULL, NULL, NULL, NULL) - true POSIX stuff like fork() et al is not needed).

Visual Studio or cygwin are out of the question. Some GCC distro like mingw might be OK depending on how much the installation sucks (ideally there wouldn't be any installation at all).

Any ideas or do I give up to ENTERPRISE-quality software?

The truth about GCC is that it is a monster of a system. This system is decades old. It has to account for a massive number of different quirks for the different standards, different languages and different architectures. The age of the system together with it's massive scope leads to results that may not be optimal as compared to more focused compilers.

This is why I believe it's not easy to compare GCC with other compilers as the other compilers target a much smaller scope.