Hello. It seems as if my command prompt will not let me do any simple system commands such as ping, ipconifg, etc. And it will also not let me use commands for my compiler. The paths are set properly in the environment variables, but it still does not work. See the screencap below: http://i.imgur.com/PTxx3fR.png I have no idea how this happened. The system has no viruses and is clean. Any help would be appreciated.