these days I downloaded the four delta one and today I was playing, so I have a problem to which I go ta lot aacontecendo serves in a game for half a second and the error "connection to host lost" my connection continues normally and the server also . what will be is that someone has a solution? (sorry my bad english)

Error is caused due to your 'Router Firewall' blocking port 3074. Login to your router interface and disable your router firewall and it should work.

Also is your router a Thompson TG Series?

But if i do this i can get virus on my pc?

But if i do this i can get virus on my pc?

If you have Windows Firewall running, you won't have any issues.