DNS problem

By wheelspk
Nov 8, 2013
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  1. Hello,

    I have problem with one of my pc's, a few days ago I started to notice that I couldn’t open many sites on all browsers, then I connected my wife’s laptop with a lan cable and every thing was working. connected both pc's to the same modem and opened a common website and the result was same, my pc didnt open the websites only same sites where as the laptop was fine, reading on the web I found people telling different ways to fix the issue and I think I have tried all:

    I have flushed the DNS Cache, as well as restarted it.
    I have also tried uninstalling the Wireless Networking Card
    Making sure that auto DNS is enabled on both modem and pc.
    I have even changed modems.
    I have tried to connect the pc on my friends network.

    The only way to use the internet was assigning and Dns in my modem and every thing works fine but my ping goes high; when I connect to auto DNS the problem comes back.

    After all the things I tried I reinstalled a New windows 7 praying things would be solved but to my sadness nothing was done, I reinstalled a new windows 2 times but nothing. I even deleted the anti virus to see it helped, that didn’t help

    I dont understand why will my pc not take AUTO DNS???

    PLEASE help me I really dont know what to do here.
  2. Blkfx1

    Blkfx1 TS Evangelist Posts: 827   +192

    Networking has never been my strong point. However, maybe jobeard will have some pointers for you.
  3. Jad Chaar

    Jad Chaar TS Evangelist Posts: 6,473   +963

    Google Public DNS (, etc) is better than auto, so you are fine. But like BLK said, Jobeard may be able to elaborate or problem solve.
  4. jobeard

    jobeard TS Ambassador Posts: 8,945   +584

    On vacation, but saw your plight....
    Basically reset etc\hosts to contain exactly and only Localhost

    Perms will be an issue, others will need to guide u further......
    LookinAround likes this.
  5. TheHawk

    TheHawk TS Enthusiast Posts: 33   +9

    Hey wheelspk. For clarification,
    Do you have a wireless router in your network?
    Is your pc also a laptop and if so, do you normally connect wirelessly?
    When you say you connected to your modem, did you mean a router using an Ethernet cable?
    When you reinstalled Win7, was it a clean reinstall (with a format), or just a regular reinstall?
  6. St1ckM4n

    St1ckM4n TS Evangelist Posts: 2,920   +627

    Semi off-topic: This advice isn't 100% correct, and shouldn't be given out in every instance of this problem. Not saying you do that.. :) but FYI.
  7. Jad Chaar

    Jad Chaar TS Evangelist Posts: 6,473   +963

    Right, but I find that is is GENERALLY better to use :).
  8. rsk2032

    rsk2032 TS Rookie

    Dear you did a lot for your computer which was not necessary the only thing you did is that change your mtu size in router from ex-1500 to 1490.this definitely solve your problem. if not reply

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