Hello there akria u see you can not really stop cmd

you can download cmd's from the web and just use a gpedit.msc i believe and there they can activate there user rights

i do reccomend how ever that you put all student accounts on guest accounts and advanced the system security with novell systems and enchance the coding login script from there to block it

also set it to where not .exe .or such can be downloaded from student accoutns