My friend's computer Internet Connection has problem. He could go to yahoo, but not the links. But when he restarted his machine in safe mode with networking and went online no problem. He could go to yahoo and the links. What's the problem? How could I solve this problem? And also he recently removed a Trojan Horse Virus. I helped him through the removal steps.

I got the problem solved. He had a strange thing in his task tray called BGHYMGA or something like that. I told him to end the task. And it worked.