Secure your Desktop Icons and Settings

You can save your desktop settings and secure it from your nerdy friend by playing with the registry. Simply launchthe Registry Editor go to: 

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer 

In the right pane create a new DWORD Value named NoSaveSettings and modify it's value to 1.

Refresh and restart for the settings to get saved.