I would start uninstalling one program at a time and reboot after each one. I would start with anything that has to do with a firewall, antispam or antivirus. I would also check the windows firewall and disable it if it's on. I would then check which services are running and do a google of each one thats not a MS service. You can also go to msconfig and uncheck all startup items and reboot. see if you can connect then. If you can, start adding one back with each restart. You might find the culprit that way
I would start uninstalling one program at a time and reboot after each one. I would start with anything that has to do with a firewall, antispam or antivirus. I would also check the windows firewall and disable it if it's on. I would then check which services are running and do a google of each one thats not a MS service. You can also go to msconfig and uncheck all startup items and reboot. see if you can connect then. If you can, start adding one back with each restart. You might find the culprit that way
At a command promp type; PING GOOGLE.COM Do you get a TTL=return value If yes, That's a good start.
Make sure that you are letting windows configure an IP address automatically
Check that your DNS entries are properly entered.
Bypass your router (if any) and connect directly to your modem.
Post your results
Any hardware you have installed since you last had internet connection? Something maybe conflicting. Any conflicts in Device Manager?
Any old antivirus software somewhere on your computer? If you did an upgrade there might be something in windows.old
Sorry, I'm running out of ideas here.
hey guys, i was having a similar problem. for the first few days with windows 7 my internet was working fine. Then all of a sudden my internet explorer, and anything else with a browswer stopped working. everything except for firefox. i thought it was firefox at first, but when i deleted that it did nothing. anyway while i was playing around in internet options, i found something.
Under the connections tab if you select lan settings. there are some boxes in there. Under proxy server i checked the boxes Use a proxy server for your LAN and Bypass proxy server for local addresses. Voila, everything works again like butter.
I had this problem for a while, finally got it fixed, it was very frustrating. anyway i hope this helps
edit:
something else to note... after this change i was trying to stream a divx file and firefox was crashing. i have since gone back into my internet settings and unchecked the boxes, and now firefox works again as it should, and everything else seems to still be working fine as well.. strange