If you have another computer or laptop compare the connections between the two. It could be your computer ethernet card or wifi card that is bad or subpar. If you don't have another computer to compare it too, then see if you can borrow a friends laptop. Besides doing the virus scans, you may want to reset your modem and/or wireless router. My modem and wifi lock up every once in a while and I just unplug them and plug them back in.
[URL=http://www.xemion.com]Web Design Firm[/URL] [URL=http://www.mybluedish.com]Wild Blue[/URL] [URL=http://www.inin.com/ProductSolutions/Pages/Enterprise-IP-Telephony.aspx]IP PBX[/URL]