When you press a letter key on your keyboard, explorer goes to the first object in your location starting with that letter (or character?).
Quote Originally Posted by Unne
because apparently a human being can type faster than Windows can think.
Yeah, while Windows processes the uber complex command of "MUST_CHANGE_THE_NAME_OF_THE_HIGHLIGHTED_FOLDER" command, Explorer fasterly thinks "HIGHLIGHT_FIRST_OBJECT_ALPHABETICALLY_STARTING_WITH_THE_LETTER_THAT_GUY_JUST_TYPED" and does so. Windows doesn't know what's going on so goes to change the name of the folder Explorer just highlighted, not the one you clicked on. Silly Windows.

Fasterly is now a word.