As unamis76 mentioned, your first step should be to disconnect that device from your network, as well as any other connections to other devices. Instead of cleaning the infected computer I'd recommend backing up important data using a Bootable OS (Ubuntu, for example) , then completely wiping the drives in the machine, and finally reinstalling the operating system. That should ensure the machine is no longer infected (as long as the virus doesn't lie within the motherboard's BIOS).