How to make your computer private from others on your account

Lonegeek

I have one account with 2 family computers on unattended access, now I would like to add my computer but I don't want anyone to be able to access it without my knowledge. I tried to set it up as unattended access but without "grant easy access" but whenever I type my password it says invalid, so how do I make it private from the others on the same account? and when it says type password does it mean my TV password or my windows password?