I've got a bunch I like, here are some of my favorites:

Itanium processor overview (series) https://blogs.msdn.microsoft.com/oldnewthing/20150727-00/?p=...

Lock-free algorithms (series) https://blogs.msdn.microsoft.com/oldnewthing/20110405-00/?p=...

Undefined behavior (also see John Regehr's posts on this): https://blogs.msdn.microsoft.com/oldnewthing/20140627-00/?p=...

Windows debugging specifics:

Rescue broken stack trace: https://blogs.msdn.microsoft.com/oldnewthing/20110309-00/?p=...

Underlying object behind COM pointer: https://blogs.msdn.microsoft.com/oldnewthing/20070424-00/?p=...

View stack of user-mode thread when kernel stack is paged out: https://blogs.msdn.microsoft.com/oldnewthing/20141114-00/?p=...

Identifying an object whose DLL is unloaded: https://blogs.msdn.microsoft.com/oldnewthing/20070425-00/?p=...

Raymond also posts "little programs" occasionally, which are great small examples of various Windows techniques.