help me please.

Try a reformat, and virus scan. Reformat usually solves everything.

That happened to me, the problem is that everytime you get a virus in your computer, the virus gets stuck in with the crossfire files unabling you to play cuz they might think it will harm the game and they have to fix it or it will destroy or create viruses in the game which will go and spread all over to the people who are playing, you must turn on your antivirus or dont download files that are fake and having virus, run a scan first or get a new anti virus thats what I did and it worked again.

cal me 4783746182 and i wil help u i work on pc everday

Suggestions:
1. Buy a new ethernet Cable
2. Take your computer to a professional
3. Just buy a new 1

Thats a bad idea if I've ever seen one. Prepare to have your phone blown up.

if he cant connect to the internet he cant go and download the latest stuff

it has nothing to do with crossfire

Make sure your internet itself is working properly(try with another computer) and try and diagnose your connection issuses

You could just reformat the computer .....

you need an ethernet driver thats why