Collapse Regedit Tree Without Disabling

There are other tweeks that change the permissions on the Regedit applet in the registry to deny access. That does work. However, in the process, you lose the ability to create favorites.
A few lines of code solves the problem. You can then create a shortcut to the .vbs file and change the icon to the regedit icon and put it on the desktop, add it to a start menu, whatever. Just put these few lines in a text editor and save as the xxxxxx.vbs.

REM ***********************************************
Dim objShell, RegKey, Q
Set objShell = CreateObject("WScript.Shell")
strQuote = chr(34)
RegKey = "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Applets\Regedit"
RegKey = RegKey & "\LastKey"
objShell.RegWrite RegKey, ""
objShell.Run "regedit"
REM ***********************************************

Disclaimer:- Modifying the registry can cause serious problems that may require you to reinstall your operating system. Please take registry back up for security purpose.