Delete files with logoff/on script

I am looking forward to create 10 workstation of public computers so that they can have access to internet and printer. I have tried using steadystate but than the disk protection that it provide is not satisfying. Currently i use gpo for the users but my other problem is that they are not protected form writing to desktop. I want to know if there is any logoff/on script that can help me in deleting my documents at every Logof/logon. I don't know if that's possible but i will like to know if it is.

Frankly speaking i don't have any idea about steadystate but you can try using a software called Deep Freeze. It is capable of wiping out all the changes that might be carried after in a system upon restart once installed. You can also set time for automatic restart after. I think that's what you are looking for, just check it out and let me know if you find it satisfying.