The sysinternals guys (Mark Russinovich and Bryce Cogswell) and code, at least most of it, existed independently of microsoft for many years. It was great. So great MS bought it and brought it and them inside. Russinovich is CTO of Azure now or something. So sysinternals is now random MS hires but I like to think it's still not really a microsoft product, just owned and mantained by them.
I was a windows user till XP came out and I've missed sysinternals tools. I'm going to enjoy this on my newer kernel machines. Seems to require some pretty cutting edge features.