Windows 10: Ethernet doesn't have a valid IP configuration Solved

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  1.    10 Sep 2016 #11

    You need to reserve the IP address on the Router too ....... if what you set under the Wifi Adaptor isn't in the range given out by the router it won't get an address.... and hence no connection...

    Have a good night....tomorrow then....
      My ComputerSystem Spec


  2. Posts : 15
    Windows 10 Pro
    Thread Starter
       11 Sep 2016 #12

    Full scan completed with no detections. Added a reserved IP address on the router... no change.
      My ComputerSystem Spec


  3. Posts : 15
    Windows 10 Pro
    Thread Starter
       11 Sep 2016 #13

    Update:

    On my PC (with no internet) I set the wireless adapter as such:

    Unchecked IPv6. If my understanding is correct, we should be able to reduce the problem to purely an IPv4 settings issue.

    Set the IPv4 IP address to 192.168.0.100 with subnet mask 255.255.255.0 and default gateway 192.168.0.1. 192.168.0.100 has been added to the router's reserved list with the PCs MAC address obtained from ipconfig /all.

    The DNS servers are set to 8.8.8.8 and 8.8.4.4. I can successfully ping 8.8.8.8, not sure if that's relevant.

    With these settings I can do an ipconfig /release then /renew, a /flushdns, /register dns, all without any errors (at least in the command prompt, I wouldn't know how to find them in the even viewer). However I still have no internet connection on the PC, and the troubleshooter is not able to find the problem.

    My laptop shows some DNS prefix stuff in the ipconfig /all. Would I have to include that in my manual setup of the DNS settings on my PC even though I'm just using 8.8.8.8?
      My ComputerSystem Spec

  4.    11 Sep 2016 #14

    lr1 said: View Post
    Update:

    On my PC (with no internet) I set the wireless adapter as such:

    Unchecked IPv6. If my understanding is correct, we should be able to reduce the problem to purely an IPv4 settings issue.

    Set the IPv4 IP address to 192.168.0.100 with subnet mask 255.255.255.0 and default gateway 192.168.0.1. 192.168.0.100 has been added to the router's reserved list with the PCs MAC address obtained from ipconfig /all.

    The DNS servers are set to 8.8.8.8 and 8.8.4.4. I can successfully ping 8.8.8.8, not sure if that's relevant.

    With these settings I can do an ipconfig /release then /renew, a /flushdns, /register dns, all without any errors (at least in the command prompt, I wouldn't know how to find them in the even viewer). However I still have no internet connection on the PC, and the troubleshooter is not able to find the problem.

    My laptop shows some DNS prefix stuff in the ipconfig /all. Would I have to include that in my manual setup of the DNS settings on my PC even though I'm just using 8.8.8.8?
    Don't set address or subnet etc on the Adaptor ..... you maybe wrong ? eg your subnet maybe 255.255.255.255 or Comcast may use some crazy one?, let DHCP handle all that since you aren't using a Static IP from Comcast (I assume). If you have reserved the IP on the Router with the MAC No# it will always get the .100 address.

    Reason for using Google's DNS instead of Comcast's Default ones? ( just curious , but I'd use Defaults while trouble shooting)

    ie recently my ISP changed something at their end and my Own router stopped using IPV6 , took some trial and error but eventually it turned out My Router couldn't be on the same Subnet as my ISP's one , IPV6 instantly came back after I changed it to 255.255.0.0 from the Router's Default.....

    You said you reset the Router to Defaults and setup again didn't you ? or just a power off/on ?

    certainly a strange one..... especially since old laptop is ok....


    KB
      My ComputerSystem Spec


  5. Posts : 3,737
    10 Home x64 (1703) (10 Pro on 2nd pc)
       11 Sep 2016 #15

    In another place I was helping someone who had a perfectly good working WiFi connection set up while running 1511. After the AU installed itself the WiFi would still successfully connect to the router, but there was no internet access. The solution we found was to go into the WiFi settings, select 'manage known networks' an click 'Forget' for that particular connection. On re-establishing the connection everything was back to normal.

    My guess is the AU didn't properly migrate the existing settings for that connection from 1511 to 1607 and they were suffering the same type of problem as being discussed here. Maybe the same type of solution will help?
      My ComputersSystem Spec


  6. Posts : 15
    Windows 10 Pro
    Thread Starter
       11 Sep 2016 #16

    I'm back to trying to use DHCP. I found a couple more relevant forum posts. One suggested checking my local hosts file. For some reason I had a bunch of entries for 127.0.0.1 pointing to various adobe.com servers. I edited the host file to only have "127.0.0.1 localhost", which I believe is the default.

    Symptom: I can successfully ping 127.0.0.1, but get a "ping request could not find..." when trying "ping localhost". I found a similar issue here:

    No Network Connection Autoconfiguration IPv4 Address 169.254.xxx.xxx - Am I infected? What do I do?

    They never posted a solution, but it gave me more things to test. Right now I'm browsing through

    Chapter 16 – Troubleshooting TCP/IP

    to find more possible solutions.
      My ComputerSystem Spec


  7. Posts : 15
    Windows 10 Pro
    Thread Starter
       11 Sep 2016 #17

    Kbird said: View Post
    You said you reset the Router to Defaults and setup again didn't you ? or just a power off/on ?
    Yes. Besides the entry I made for a reserved IP, the router should be in its factory default state.
      My ComputerSystem Spec


  8. Posts : 15
    Windows 10 Pro
    Thread Starter
       11 Sep 2016 #18

    Bree said: View Post
    In another place I was helping someone who had a perfectly good working WiFi connection set up while running 1511. After the AU installed itself the WiFi would still successfully connect to the router, but there was no internet access. The solution we found was to go into the WiFi settings, select 'manage known networks' an click 'Forget' for that particular connection. On re-establishing the connection everything was back to normal.

    My guess is the AU didn't properly migrate the existing settings for that connection from 1511 to 1607 and they were suffering the same type of problem as being discussed here. Maybe the same type of solution will help?
    Thanks for the reply. I have tried forgetting and reconnecting, to no effect.
      My ComputerSystem Spec

  9.    11 Sep 2016 #19

    Refresh me ......so the old laptop from garage is ok but the Desktop and current Laptop are not ?

    It seems like your are doing all the right things , if it was one PC I'd suspect that PC but it's two correct? both on same version of Windows? (Win Key+ R ... type winver...enter) perhaps Rool one Back if possible ( in case OS issue) as a test.

    I have heard of Router Virus's but never run into one myself ......

    Is Router on latest Firmware ( or known good one) from the Manufacturer ?


    KB.
      My ComputerSystem Spec


  10. Posts : 15
    Windows 10 Pro
    Thread Starter
       11 Sep 2016 #20

    Kbird said: View Post
    Refresh me ......so the old laptop from garage is ok but the Desktop and current Laptop are not ?

    It seems like your are doing all the right things , if it was one PC I'd suspect that PC but it's two correct? both on same version of Windows? (Win Key+ R ... type winver...enter) perhaps Rool one Back if possible ( in case OS issue) as a test.

    I have heard of Router Virus's but never run into one myself ......

    Is Router on latest Firmware ( or known good one) from the Manufacturer ?


    KB.
    There's one laptop running windows 7 32-bit. It can connect to the internet via its onboard wifi, and via ethernet (in this way, I've tested both ethernet cables and ports on the router). The desktop (with Windows 10) has the problem.

    If I can't figure this out by the end of the day, I'll try reinstalling windows 10 on the PC.

    Even though microsoft security essentials (or whatever it's being called now in 10) didn't find any malware, that's certainly still a possibility.

    Router is on the latest firmware (though there hasn't been an update in a while).

    I think I've tried just about everything I can. Most forum posts in a similar situation end up going into very low level stuff like using wireshark to monitor packets and making multiple registry changes, which I just can't do myself.

    My conclusion so far:

    The fact that this "just happened" one day really makes it sound like a hardware issue, except that I have the same problem with 1) motherboard ethernet 2) wifi card 3) brand new ethernet card. If it's a software issue, it could be a virus, and I need to find some better antivirus software. Otherwise it's a windows bug, and reinstalling windows might be the only solution.
      My ComputerSystem Spec


 
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