Show/Hide Hidden Files and Folders using Registry

Here's how to enable/disable hidden files/folders using the "Registry Editor"

Open the "Registry Editor" ("Start" >> "Run", then type "regedit" and Enter).
Expand to the following key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Explorer\Advanced
If the value "Hidden" exists, double-click on it to edit its value to (1 = show hidden, 2 = do not show)
If the value "Hidden" does not exist, create it as follows
Name: Hidden
Type: DWORD
Value: 1
(1: show hidden, 2: do not show)