Sorry, I’ve just processed what you said. When you right-click it displays a context menu, and things like Zip programs often add their own tools to that menu.
If 7-Zip gives you the option whether or not to install the context extensions (sometimes called Explorer Integration or some such) during setup, I’d bet that not installing them would fix the issue.
(And on a point of note, that’s not really “breaking Windows,” rather Windows is waiting on a third party tool to return information.