On Windows 7, when I right-click on an item in my namespace extension (NSE), the context menu includes the verb Open. On Windows 11, Open is missing. I am testing with shell items whose DisplayName extensions are always .txt. On Windows 7, when I double-click such items, Notepad.EXE launches and attempts to load the “file” denoted by the path yielded by GetDisplayNameOf for that item. If I cause the path to denote an actual file on my C: drive, Notepad.EXE opens the file. On Windows 11, double-clicking does nothing. Furthermore, on Windows 11, the Open verb is missing. So is Open with… for that matter. If I right-click and do Show more options, I can see an old verb that I have been using on Windows 7, which is Bake, as in baking a cake. I implemented IExplorerCommandProvider, IEnumExplorerCommand,and IExplorerCommand. As a result, on both Windows 7 and Windows 11, I can see my Bake verb in Explorer’s command bar, and it is ::Invoked appropriately and works, but nothing shows up in the context menu on Windows 11. I did ~not~ do a sparse manifest for my Inproc COM Server DLL because I’d rather avoid wild-goose chases until someone knowledgeable explains how it should work.