I installed Service Pack 1 on my three machines; one desktop is hardwired to my AT&T 2Wire gateway(router), one Netbook is wireless and the other desktop is also wireless. Install went great on all three machines with one strange exception. On my wired desktop the Network icon in the Start Tray now has a yellow exclamation mark and says that I have no internet access. The first time I saw this I uninstalled SP 1 and the icon returned to normal. I reinstalled SP 1 and the yellow exclamation mark came back again. So much for background; now the strange part! I do have complete internet access. Not only that, I have total file sharing ability between the three computers. Has anyone ever seen this problem before? If so, how do I fix it, other than uninstalling SP1?