Can not start games

I just upgraded to Norton 360 v6.0 now I can't start my games I was playing before I upgraded. Steam , Forsaken World  won't  start and don't get any message just will not open. Any help out there please??? I am not real good at this computer stuff but will try to figure it out if anyone gives me any ideas..    Thanks

I just upgraded to Norton 360 v6.0 now I can't start my games I was playing before I upgraded. Steam , Forsaken World  won't  start and don't get any message just will not open. Any help out there please??? I am not real good at this computer stuff but will try to figure it out if anyone gives me any ideas..    Thanks