I am desperately trying to get YouCompletMe working on windows, the author clearly says that there is no official support for windows so that\'s fair enough. Though there is
Adding to the accepted answer (SE won't let me comment), I got Alexander Shukaev's binaries from here:
https://bitbucket.org/Alexander-Shukaev/vim-youcompleteme-for-windows/downloads
(in case the links on the other page are still broken).