Hack Register Files to Make your System Faster.!
Right-clicking on everything is a good way to learn about hidden Windows functionality.
Exploring the lesser-known Control Panel applets is another useful technique, and browsing the command line applications in Windows' System32 folder can be interesting. But let's be realistic.
There's nothing that quite compares to the Registry.
1. Improve security
If strangers have physical access to your PC, it's easy for them to plug in a USB flash drive and make copies of your data. If you're using Windows XP SP2 or later, though, there's a simple way to prevent this from happening.