Getting rid of the items you don’t use can be helpful in navigating the sidebar—a cluttered navigation pane can make it more difficult to find the items you do want (especially if you have more than a few libraries). Technology blog Ghacks has put up a quick guide to hiding them, and all it requires is a bit of minor registry editing.
Windows Explorer’s sidebar comes with a few entries in it that not everyone uses, such as Homegroup or Libraries. If you’d rather keep your sidebar clean (or populate it with more useful items), here’s how to hide the defaults.

