Drives can be shown in a few different places, including the file display, location bar, folder tree and toolbars/menus. Which one are you right-clicking? (Or is it the same in all of them?)
Is there a busy pointer or CPU usage or anything that'd indicate the menu is being built but taking longer than usual or getting stuck?
If it's getting stuck, some Manually generating process snapshots may reveal what's happening.
Another test you could do:
- Run
Help THEMETESTER(e.g. make a button for it and click it, or type>into the file display and paste the command into the field that opens). - Select Common Dialogs at the bottom.
- Click the first button, IFileDialog Open
- Within that dialog, navigate to This PC and right-click a drive.
If that also doesn't display a menu, it's likely a shell extension causing the problem (maybe when inside some processes and not others). You can see the installed extensions under Preferences / Miscellaneous / Shell Extensions, and the Context Menu and Context Menu (UWP) categories.
Extensions that add menu items for tools for disk backup / defrag / checking have caused problems in the past, for example.