As I did not want to always go online, I missed the old offline MSDN library and wanted to have something like that again. For IDA there seemed to be an annotating plugin MSDN Annotations, however it looks like the Microsoft download link got removed. So via Discord rattle posted this link “Ghidra + MSDN Offline Library” which has a still working ISO with a Help Viewer. It is not the newest help but for core Windows functionality not that much should have changed.