Is it possible to do things such as scan for viruses, spyware, and even defragment a computer from another computer via a crossover cable, using one computer to fix the other? I have to clean up several computers for friends, and i don't want to have to take their hard drives out and connect them to my computer, nor do i want to install and uninstall several pieces of software on each of the computers. I'm looking for the simplest way to fix their computers using my computer.