Weird wireless internet connection

I have a Dell laptop with Win7 Ultimate 64bit at home. Sometime I could access internet via wireless. Sometime I couldn't as it shows "no internet access". The weird thing is: when I turn on my work laptop and logon, my home laptop would have internet access immediately and even then I turn off my work laptop, it still has the internet access. I have checked BIOS/Wireless Card/Router Setting, power plan policy, TCP/IP setting, update to lastest firmware and tried many ways I found from internet. No luck. That's weird.

Here is my info:
1. My home Laptop : Dell Inspiron, Win7 Ultimate 64
Tried Win7 Pro 32, Tried with different internal wireless cards, same results.
2. Modem/Router: TP-LINK 8840T modem+router, add D-LINK DI-524 as wireless AP(disabled DHCP),
WPA-PSK/WPA2-PSK (w or/wo broadcast)
3. My work Laptop: HP Probook, Win7 Enterprise 64.

Any ideas are very appreciated.

 

Hold the Windows key and press R, then type CMD to open a command prompt. In the command prompt window that opens, type type the following command: IPCONFIG /ALL

Right click in the command window and choose Select All, then hit Enter to copy the contents to the clipboard then paste the results in a message here.

 

Thanks VictoriaiiCe. I will post them when I get home.

 

Here is detail when there is no internet access:

Windows IP Configuration
Host Name . . . . . . . . . . . . : Test-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Wireless LAN adapter Wireless Network Connection :
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Atheros AR9285 Wireless Network Adapter
Physical Address. . . . . . . . . : 1C-65-9D-42-B5-4C
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.103(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : November-04-11 7:17:50 PM
Lease Expires . . . . . . . . . . : November-07-11 7:27:12 PM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 8.8.8.8
8.8.4.4
NetBIOS over Tcpip. . . . . . . . : Enabled
Tunnel adapter isatap.{9C895D8B-96A9-40C1-9D8B-86574C652ECD}:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Tunnel adapter Teredo Tunneling Pseudo-Interface:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

When there is internet access:

===========================================================================================
= IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:fc:b4e1:ba59:8552(Preferred) =
= Link-local IPv6 Address . . . . . : fe80::fc:b4e1:ba59:8552%12(Preferred) =
= Default Gateway . . . . . . . . . : :: =
= NetBIOS over Tcpip. . . . . . . . : Disabled =
===========================================================================================

 

A couple of things I would Try.

1. Roll back your drivers.
2. Flush your DNS ("ipconfig /flushdns")
3. Disable UPnP on your router. I have seen Plug and Play mess up wireless configurations with clients I have had in the past.


Post back with results and I'll try to get back to you as quickly as I can.

 

Thanks for help.

Already disabled uPnP in router.
Sounds like DHCP Client did not work when the laptop had no internet. Tried it when the laptop lost internet connection and after restart the DHCP Client service the internet come back.

 

Issue resolved? I had an idea- I was going to have you uninstall the Atheros wireless network adapter: http://www.pcpitstop.com/drivers/download/Atheros~AR9285~Wireless~Network~Adapter.html and reboot to see if that made any change.

Also when you get a chance I need you to run a cmd:
go to start > run> type: cmd> type: ipconfig /flushdns

 

hmm..Hope that doesn't keep happening! Glad things are up and running! Let us know if it gives you anymore trouble

 

Thanks VictoriaiiCe. Now I know the issue is related DHCP Client service. But main reason I still do not know. And why when my another laptop turns on, this one ("Home laptop") would have internet. Sounds like I set parental control on this laptop.