Hack a computer remotely using Realtime spy

I get this question asked daily "How to hack a computer remotely" OR "How to install a keylogger in a remote machine".As we know that in order to install a keylogger we must have physical access to victims computer.There are lots of methods to gain physical access such as Netbios hacking ,Trojans, Rats etc.However these methods require alot of skill and its very difficuly for newbies to do