I have a laptop running windows xp, internet explorer 8, on company network. It connects to the network fine, wired or wireless, but intermittently it does not connect to the internet thru browser, nor does it receive emails on Outlook. It sends email but won't receive. The network is set to assign ip addresses, so i manually set the address on this computer-no change. I tried ipconfig /release /renew /flushdns etc.-no change. I can successfully ping an outside ip address, by number or domain. But still get the cannot access the internet thru browser. If i restart the computer, it might work for a day or two, then stops working. I turned off firewall, windows and macafee, doesn't make a difference.