Not sure whether this is the right place to post.
It may happen that one wants to check whether there are any duplicates of a selected file.
Whilst using Everything (Voidtools) v1.5 - See: Everything downloads
one might add a context menu item reading as follows:
"\path to everything-exe\Everything64.exe" -s* size:[getsize:"%1"] ext:[get-property:"%1","extension"]
Important: use the latest version...
r-click file and select "Everything Find Dups..."