Windows' File Manager ("explorer") acting weird

Experiencing a few relatively minor but annoying issues...anyone else, and if so, what if anything helped? eg:



- when I double-click a sub-folder, it opens in a new window, even tho I don't have that option chosen



- if I do a search and right-click on a result and select "open in file location".....it doesn't (nothing happens)



Searching the 'net hasn't turned anything up as yet...

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