To Disabling access to Control panel...

If you are an Internet cafe owner, public computer owner or if you have many users in your computer and you want to disable the Control Panel for those users then log in with the user that you want to disable access to the Control Panel.Open registry editor by going to run and typing "regedit"In the Registry go to my computer\HKEY_current user [or HKEY_LOCAL-MACHINE for all users] \software\microsoft\windows\currentversionv\policies\systemSet value 1 to nodispcpl key.