Quite an interesting news (here for example): Microsoft is rewriting core Windows libraries in the Rust programming language instead of C/C++. Rust is a programming language which is “memory safe” which means that prevents entire classes of bugs which can lead to vulnerabilities and exploitations.

Do not expect that all Windows will be rewritten in Rust, it would be an enormous task and probably it will make little practical and technical sense. But rewriting key components of the operating system in a security minded programming language is for sure a great security step forward.