ChippZanuff

I believe I have been infected with a root kit. Whenever I try to scan my computer using malware bytes it runs for days before finally just closing. I have also tried using super anti-spyware. My computer runs very slowly and carries out random processes. I have tried deleting obscure files via command prompt but when I try to delete certain files it simply says access is denied. So I tried using command prompt to create a new user with administrative priviledges and it says the same thing. I am at a loss...