Few days ago I have came to know about a bug for microsoft windows (not exactly the bugs you can say it easter eggs) or often you used to refer these bugs as tweaks or tricks of windows…  This is all about how to make a new folder with unseen name like dollar sign, or any symbol like beta or alfa or gama or you can also make it without adding a name.
This one is for making a folder without any name
hold ‘alt’ and press 255 (Ascii number for empty space). release alt key. There will be folder created without any name…

And you can also do more thing using…
here are some examples of ascii values you can find a full list of asciivalues on internet just download it and enjoy using difference.

alt  + (num)    effect
?         63    Question mark
@       64    At-sign
^         94    Caret (Circumflex)
$        36    Dollar sign