How do unblock something on my computer?

I became saving a personal game (Combat Arms) as well as my own laptop or computer asked merely must let use of a thing.WHEN I unintentionally mentioned very little, and from now on this will not down load.Just how do i enable admittance all over again

Begin your firewall adjustments along with permit the overcome arms.If i knew what firewall you used to be utilizing I possibly could allow you to much more.