10.3 Is there a version of my VC software I can use with Emacs?

If you are using a graphical revision control tool already, check if it comes with command-line tools. Many such GUI tools are just wrappers for the same command line tools that Emacs requires for its VC integration. Most of the supported VC systems have well supported Free native Windows binaries. For those that don’t Cygwin may be an option. See Other useful ports.