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Windows 7: WiFi problem?

01 Sep 2010   #11

Windows 7 Home Premium 64bit

Quote   Quote: Originally Posted by nickiler View Post
Check your network card for Alternate Configuration settings. This is in your network cards Properties -> IPv4 -> Alternate Configuration tab

This could explain why your automatically changing IP's settings. You can also be having problems with the DHCP service of your router. It is responsible for assigning you your IP address. Once you have an IP address it is recorded in DNS along with the hostname of your computer.The nslookup command will relate your name and IP.

If you just set the IP as static you should be OK.

ip -

mask -

gateway -

dns -
I always recommend setting the ISP's dns here if possible but you can use the default gateway -

Long term you may need a router firmware upgrade or rule out the network card and the router.

Thanks, you fixed it.

My System SpecsSystem Spec
01 Sep 2010   #12

Windows 7 Enterprise 64bit

Glad to help.


My System SpecsSystem Spec
01 Sep 2010   #13

Windows 10 Pro x64

Well, you've not fixed it, you've masked the problem if you just specify the IP address. If that's OK with the OP, then fine, but you've not "fixed" anything - you've just removed the symptom. The real question is - why is the client machine getting a gateway, DHCP server, and DNS address of first, and then afterwards? Are these both the same hardware giving out bad addresses, or are there two devices on the network giving out DHCP (but only one is actually attached to the internet connection)?

Cursayer, would you be able to do the following to confirm this:
  1. Download and install wireshark (take all default options)
  2. Release (do not renew) your IP address
  3. Disconnect the network cable from the network card
  4. Reboot
  5. Log in, and start wireshark capturing against your network card
  6. Reconnect the network cable, so wireshark captures the first DHCP offer.
  7. Verify you have a 192.168.x.x IP address, and also a gateway and DNS server configuration of (as seen in the first screenshot)
  8. Run the ipconfig /release command
  9. Save the Wireshark network capture as "before.cap", and start a new capture
  10. Run the ipconfig /renew command
  11. Verify you have a 192.168.x.x IP address, and also a gateway and DNS server configuration of (as seen in the second screenshot)
  12. Save the Wireshark network capture as "after.cap", and close Wireshark
Zip up the two .cap files, and post them.
My System SpecsSystem Spec

01 Sep 2010   #14

Windows 7 Enterprise 64bit

If this occurs with another system then his router it to fault. Otherwise he has a driver problem with his current nic card or some sort of nic misconfiguration.

Also to find out if their is another system acting as a DHCP server just turn off the DHCP service in your router. If you get an assigned ip then you do have another DHCP. This is unlikely in a home as most people have one router on their LAN.

Type nslookup on your command prompt.

This will expose the responding DNS server handling DNS.

My System SpecsSystem Spec
07 Sep 2010   #15

Windows 7 Home Premium 64bit

I exchanged my laptop because there was a cheaper one, and now the IP address I am getting is "169.254.x.x", how do I fix this?
My System SpecsSystem Spec
08 Sep 2010   #16

Win 7 Pro x64

cluberti should get a kick out of this.

FYI, when you get that address, known as APIPA, it means that your computer didn't get a response from the DHCP server when it sent out a DHCP request broadcast. getting that address typically means that either the DHCP server heard your request and for whatever reason purposefully refused to give your laptop an address or that your laptop simply didn't have a properly configured path in which to send the broadcast to the DHCP server (the server never got the request so it couldn't respond).

i would speculate that if there's an issue with your WIFI security and you have invalid/wrong information in your security configuration on the laptop that it couldn't get an IP address because it couldn't actually attach to the WIFI network. that's speculation though, because it's also possible that you'd never even get as far as requesting an address without having the proper network key configuration anyway. i'm sure someone can clue me in..
My System SpecsSystem Spec
08 Sep 2010   #17

Windows 7 Enterprise 64bit

What happens if you plug directly into the modem using Ethernet? If you get an IP address then your DHCP is working fine. You need to look at your Wireless settings.

Even if you need to reset the router and reconfigure it you would still get DHCP. Most routers come with DCHP enabled by default. This makes them plug and play for the most part. Don't reset the router if this is DSL without having the correct PPPoE settings before hand.

If that does not work I would demand my ISP (Shaw Cable) send a replacement unit ASAP.
My System SpecsSystem Spec

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