It's too bad there's not a free licensed version of a Linux system that can successfully be run on most personal computers with a Windows-like interface (idiot-proofing, in other words) and enhanced security. It would most definitely be a good system.

With the security there and the Windows interface there, what more could you ask for? Everything would be easy and compatible (though this suggests a whole new set of programs would spawn) and in working order. Maybe not 100% security, as suggested before, but close enough to keep potential harm away from the "Windows" system.