can connect to network but not the internet

Posted on 2012-08-28
Last Modified: 2016-01-08
Hello i have a sony vaio SR19XN laptop, according to the network map it connects to the network but has no internet access. I dont believe it is connected to the network as i cannot ping either the router or any other device on the network. It has vista 32 bit O/S. I have tried resetting the Winsock, tried unchecking and rechecking the IPV4 protocol, IPV6 i have unticked. It seems to get all IP info issued correctly via DHCP:
Connection-specific DNS Suffix:
Description: Intel(R) WiFi Link 5100 AGN
Physical Address: 00-16-EA-36-27-00
DHCP Enabled: Yes
IPv4 IP Address:
IPv4 Subnet Mask:
Lease Obtained: 28 August 2012 23:10:15
Lease Expires: 29 August 2012 00:10:19
IPv4 Default Gateway:
IPv4 DHCP Server:
IPv4 DNS Servers:,
IPv4 WINS Server:
NetBIOS over Tcpip Enabled: Yes

But the problem is the same if i manually configure the the network settings. I have tried uninstalling and re-installing the drivers, i have checked to see if i have the latest drivers installed. I have checked i have no driver conflicts. I am now at a loss as the next thing to try, so any suggestions would be helpful.
Question by:l-gould

    Expert Comment

    Have you tried doing a IPCONFIG /release     -----  IPCONFIG /renew ?  If it goes out and grabs a new IP address then it is not the connection to the router.  If that works try this tool.  It can save you a bunch of time chasing around what could be one of many problems.  Also I should ask the obvious.  Are other machines able to reach the internet?  It may be a issue with the router or modem.  I would reset them both.
    LVL 25

    Expert Comment

    Troubleshooting network connection:

    Does it show sent AND recieved packets on the network connection status?

    Is this a wired or wireless connection?

    1. check for link/data lights on the card (where the ethernet cable connects
    2. check for link/data lights on the switch
    3. ping the switch
    4. ping the router
    5. tracert (Google's ip)

    Those are the first steps I take for a wired network.
    LVL 2

    Expert Comment

    by:Vinod Pawar
    Diasable your windows Firewall service restart machine.

    Author Comment

    Thanks for your comments, i will try the ip config release and renew later today, and then that tool you've supplied the link for. It does show sent and recieved packets, it has the same problem on both the wired and wireless connection so i am just focusing on the wireless connection at the moment as i figure if i solve one issue it will be the same solution for the other. But in answer to your post i get link lights on both router and laptop, i have tried to ping the router (its working on a home setup so its a direct connection to the router no switch involed) but it does not ping successfully. i'll do a trace route but i don't think it will get anywhere. And in response to the final post by Viphit i have done that already, the windows firewall, and i have un-installed the antivirus software totally, so any firewall from the antivirus is no longer relevant, it was Mcafee by the way.

    Expert Comment

    A couple other ideas that come to mind are:

    1)By chance are you using Internet Explorer?  If so have you tried another browser?  Internet Explorer tends to be much more problematic than other browsers. Also there was a virus that affected a large portion of computers that rerouted internet traffic through a server so the people who wrote it could collect a ton of money from directing traffic to certain advertisers. Most people who were infected had no idea at all. It didn't just change their DNS settings, it change the browsers code. When they got caught a temporary server was set up to route traffic correctly so people still didn't know they were infected by it.. They recently took that server offline so many people are getting "Page cannot be displayed" errors.  If you install a new copy of Firefox or Chrome   it seems to fix the problem.

    2) Try changing the settings on your network adapter to point to a different DNS server. Just go to the properties of the card select IPv4 on the list and then properties. Click the advanced button and then the DNS tab.  Try Google's which are & or any from this list:

    Accepted Solution

    Thanks for your comments gents, it turns out that some remnents of mcafee was still installed, it was the site advisor software along with the internet security bit of mcafee. Un-installed and all ok, hours of checking for that.

    Thanks alot gents, sorry it turned out to be a bit of a waste of time.
    LVL 25

    Expert Comment

    It's never a waste of time when there is an issue that needs to be resolved.  That's why this site is here is to help others.   :)

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