Dude you cannot be traced, nor does microsoft track down single users.
They use scare tactics and then unless you are selling pirated windows they might go after you but a single user has no problems. Believe it or not even with piracy microsoft makes billions, they scare a few into buying legit and do not care if other people pirate it as long as they use windows

.
Scare tactics do work though as can be seen in this thread.
Right now microsoft is watching your every move. They know where you live and in about 5 minutes your house is going to be under the most severe attack known to man

. I am talking smoke bombs, tear gases, armour piercing bullets.