http stopped working in ie and firefox, https still work, visto os

Posted on 2009-04-17
Last Modified: 2012-05-06
I am using vista home, suddenly browser doesnt work, immediately gives http 404, but doesnt ever actually try to resolve, firefox is blank, but https works fin.
Question by:msch00ley
    LVL 6

    Expert Comment

    Sounds like a firewall issue (outgoing http). You can try restoring the defaults in vista (network and sharing center, windows firewall, change settings, advanced, restore defaults)
    LVL 1

    Expert Comment

    Other things to try:
    I ASSUME you are sure that your ISP is up, and you have checked that some how.
    Ok... Hit start-run-command(onvista, I think it is all programs, then command). Once command launches and you have the black box, type IPCONFIG/all and hit enter. You are looking to make sure that under DNS you have a public IP, or the IP of your gateway(router). Note whatever IP is there.
    Then type in the command box, PING Where the x's = the IP in your DNS setting on the previous command. If your DNS IP is private (ie, or, and you get replies then your router LAN side is working.
    Anything but reply from... is a failed ping.
    If your DNS IP is public, and you get replies then your connection to your ISP(internet service provider) is working.
    If your DNS IP is private and you do not get replies, the issue is between your PC and your router. Try power cycling your router and see if that solves the problem. If it does not then we have to look at your PC. Let me know and we can address the PC-router troubleshooting in another post.
    If your DNS IP is public and you have a router and you do not get replies, still power cycle the router and the ISP's modem to see if that fixes it. If it does not, Post and we can go from there.
    If your DNS is public and you DO NOT have a router, and you get no replies then power cycle the ISP modem, and if that does not fix it we can look at your PC.
    If your DNS is private and you get replies then the next step would be to ping a DNS server at your ISP, but since you don't have that, use MY ISP's DNS. Type PING (this is DNS server at Cox here in Las Vegas)
    If you get replies then your connection to the internet is working.
    Now type ping
    If you get a reply, and you still can not browse the internet, then the problem is almost certainly with your browsers-OS.
    If you do not get a reply from yahoo, then your problem is with DNS. First try contacting your ISP, Second we can help you set up a different DNS. Tell us who your provider is, and we may be able to find alternates there, or we can give you a few public ones that work for anyone.
    If you got replies from your router, and you do not get a reply from my DNS, your problem is probably with your ISP. Try resetting the Modem, and see if that fixes it, if it does not, we can try from there.
    If you can PING my DNS, then there is one last test to try.
    If you do not get replies then see above for DNS problem.
    If you get a reply, and you still can not browse the internet, then the problem is almost certainly with your browsers-OS.
    Pleae advise how these tests worked for you.

    Accepted Solution

    its not a dns issue, as i can ping by name, and the pc right next to it works, and if I put in https:website name (for a site that does https) it works fine.  Prolbem is that it immediately goes to 404, or with firefox, a blank page, doesnt even try to resolve, will put sniffer on it to see if any packets are being sent or recieved.
    LVL 1

    Expert Comment

    Msch, sounds like it is definitely the browser.
    Could be some form of malware.
    Have you tried hijack this? I have LOVED that toll since long before it was a trend micro tool.
    There are several online hijackthis logfile analyzers. Here are a couple:
    For the most part you will recognize most of the programs that you see in your HJT log, it is the ones you don't recognize that will tend to lead you in the right direction.
    Hope this also is helpful.

    Author Closing Comment

    closing issue

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