This tweak controls whether the Control Panel is shown as a cascading menu or as a simple folder link on the Start Menu.
Open your registry and find the key mentioned below.
Create a new string value, or modify the the existing value, named ‘CascadeControlPanel’. Modify the value to equal ‘YES’ to enable cascading or ‘NO’ to disable it.
Exit your registry and log off for the changes to take effect.
Note: By using the same key except under the [HKEY_LOCAL_MACHINE] tree the tweak can be enforced system wide, instead of only user based.
Registry Settings:Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
Value Name: CascadeControlPanel
Data Type: REG_SZ
Data: YES or NO