My computer is an HP Pavillion a1677c AMD dual core. I've had it about 5-6 years. About 2 months ago the video card died so I've been using the onboard video. However since then it ties up the internet and network connection without any thing running. I've run Avast, Spybot S&D, MalwareByte and nothing shows up. It doesn't do it all the time and restarting the computer solves it for awhile. When it does act up the send light on the cable modem is steady on. I've checked connection on everything multiple times and reset the bios. Any ideas on what is causing this?