Why disable firewall and antivirus ?

[cascaderailroad]

I have installed Trainz and my firewall and antivirus never caused a problem. Norton antivirus, and webroot Spysweeper. Perhaps they are not working ? Trainz never gave me a problem.
cascaderailroad@yahoo.com

 

[BLACKWATCH]

They advise it because it can & does cause problems for some.
It may have been OK for you, but like life, things affect different people/computers in different ways.