Not sure if this has been posted before but here's a neat little trick for Windows 7 (x86 or x64).

Create a new folder (it can be anywhere, its doesn't matter) and name it exactly as written below:

GodMode.{ED7BA470-8E54-465E-825C-99712043E01C}

As soon as you rename the folder, the folder's icon will change (thats if you have renamed it correctly).
Open it up and you'll have access to just about every tool & setting found in the OS.

Some people who tweak alot may find this usefull