the two are very different and set up for VERY !!! different reasons
Copyright was HIJACKED by legacy businesses from the GOVERNMENT -FOR THE PEOPLE !!!
Trademark it for PROTECTING the PUBLIC from harm
and uses the old UK concept of " A moron in a hurry" on product confusion
as long as you are NOT selling a computer operating system the trademark on the windows logo dose NOT matter
however the COPYRIGHT dose
but here is the kicker
most of the time YOU CAN NOT know if you infringed or NOT without spending about $1,000,000 and having the court say one way or the other .
i am NOT!!! a lawyer , i just read a lot
you have noticed that in the last ten years that the logos on T-SHIRTS on TV shows are blurred out
this FREE ADVERTISING might get the video producers SUED for the FREE ADVERTISING
yes this is FRACKED UP and needs to change