Pinging www.l.google.com [64.233.179.99] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 64.233.179.99:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Then I pinged www.yahoo.com, there is no problem.
I am wondering if some kind of trojan caused problem. If so, what kind of anti-virus program can kill trojan?