My wife had been complaining of our computer being slow. I had put it off and kind of ignored the problem because when i would hop on it. it would work just fine. However I would only be on for a couple of minutes never any length of time.

But at Christmas my kids received Zune’s for gifts. when I went to use the zune software which was already on my computer because I have a zune but had not used the software much since I connect it to another computer.

So when I setup my kids zune I noticed that I kept having failures when it was downloading podcasts and other things. I kept looking and found a bunch of TCPIP 4201 events. No errors at all. but it showed the network card would reconnect every 10 minutes. I then noticed occasionally DHCP would reissue the address also when this would happen everything would slow down.

I searched google for a while and found all kinds of different answers. but none fixed the problem. I finally uninstalled the wireless card which was a linksys WMP54G which says it supports vista. As soon as I uninstalled it and selected shutdown the computer immediately shutdown which it had been having problems with before.

So I installed a wired nic and all is now working with out any problems.

The interesting thing about this is that the TCPIP 4201 event is just an event it is expected behavior because the card is connecting. I have seen this on a windows 2008 CCR cluster and it had similar problems. but found that changing the TCPIP offload settings fixed that problem. So what this leads me to believe is that when you are having strange problems check your nic and make sure it is not reconnecting every now and then.