Posted 12 September 2009 - 01:27 PM
I have a very strange problem on my Windows XP Media Center (with all updates installed, including IE8): after the boot I can browse internet for a short time (around 5-10 minutes) but after that it is no longer possible to use any browser (tryed IE, Google Chrome e Firefox). I tryed to use other programs and it seems that no program can use the HTTP protocol, although other protocols are working just fine (I still can use skype for video, audio and chat, and can connect with ssh to external servers). It seemed to me that probably some firewall or internet inspection program was blocking the HTTP protocol.
The strangest part is that by using wireshark I found out that each time I try to browse internet there are some IP packets going to the network (as expected) but having as source address strange IP addresses (different IPs changing often and having nothing to do with my network). Those packets have as destination the correct IP address of the website I try to navigate to. This seems quite strange to me, since an web inspector would eventually block access and should not send packets with wrong IP address as source...
Anyone has an idea of what the problem might be?
I am using a wireless link for internet connection (shouldn't matter, since the connection is ok and i can use other protocole) and have Symantec Internet Security installed on the PC. I tried to completelly disable the antivirus and internet security of Symantec but still could not browse internet.
Could it be some strange malware or spyware? Or maybe some system driver corupted???
Thank you for any help.