Cannot access internet

What operating systems are you using are you going through a LAN etc
Please elaborate on the initail question.

~Cheers

If this has suddenly started happening (ie. nothing else has changed), then most likely, your ISP is down.

Can you ping any other computers internally? Can you ping your router? Are you using ip address or DNS to ping?

If there are no problems on your internal network, then check with your ISP. If you do have problems on your internal network (cannot ping anything), then begin by troubleshooting network (Control Panel).

If you cannot get a response from your external world and nothing has changed, then call your ISP and find out if they are having trouble. Hurricanes are prolific in the US right now, depending on where you are, your Internet access could be impacted.

If most computers have no problem with the internet, and a few do... then those few are not properly setup.

Look at the ip address, subnet mask and gateway settings on one of the working computers.... then look at the same on one of the non-working computers. Make the non-working computers use the same gateway (router ip address), and subnet mask as the working computer. Save and reboot. Then see if you can ping outside via dns name or ip address.

If it's still I problem, look atthe NIC and make sure that there are no irq conflicts or errors in device manager. If the NIC is partially functional -- the computer interacts on the internal network just fine -- then look at the software options on the NIC and compare with another working computer. If all else fails, replace the NIC. If it's still a problem, then it's a software setting.