Only single laptop doesnt get internet access

[artikle]

This problem is making me go mad since two days. I've tried everything little thing I've come across to no avail. Please help me.
Basically, I have an Asus RT-N13U B1 router. It is in router mode(IP Sharing). So everything is normal till now. I have various phones, tablets, laptops, TVs and a desktop connected to it. Now suddenly two days ago, one of my laptop stopped getting internet access and is unable to access the router configuration page, though it is connected to the network. Im not finding any reason why this should happen and am unable to solve. Please help me. It is literally driving me nuts Thanks

ipconfig/all :
Microsoft Windows [Version 6.2.9200]
(c) 2012 Microsoft Corporation. All rights reserved.

C:\Users\ABHIRAM>
Windows IP Configuration

Host Name . . . . . . . . . . . . : ABHI
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Local Area Connection* 12:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
Physical Address. . . . . . . . . : 06-2F-68-B0-C5-44
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wi-Fi:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Qualcomm Atheros AR9002WB-1NG Wireless Network Adapter
Physical Address. . . . . . . . . : 74-2F-68-B0-C5-44
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::1c8b:a368:ca52:32a7%26(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.200(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, May 2, 2013 2:23:55 AM
Lease Expires . . . . . . . . . . : Friday, May 3, 2013 2:53:22 AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 611594088
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-18-73-A5-18-74-2F-68-B0-C5-44
DNS Servers . . . . . . . . . . . : 192.168.1.1
203.109.88.226
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Bluetooth Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
Physical Address. . . . . . . . . : 74-2F-68-B8-0C-8D
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Ethernet:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 54-04-A6-03-4D-AC
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

Media State . . . . . . . . . . . : Media disconnected
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

Tunnel adapter isatap.{551B531D-C39B-47B8-95EC-6C2349FF4513}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

C:\Users\ABHIRAM>

 

[artikle]

Im really sorry guys. I couldnt get spoiler working [DOUBLEPOST=1367504273][/DOUBLEPOST]Anyone? Please!

 

[vivek.krishnan]

Try to assign it a different IP address and check.

 

[artikle]

Try to assign it a different IP address and check.

Tried. No change in result. This is making me go mad

 

[vivek.krishnan]

Try re installing the device drivers. Still does not work? Change SSID/Restart/Reset the router.

 

[artikle]

Today, in a fit of rage, I reinstalled windows and all the drivers on the laptop but still no go. I'm going mad. The laptop connects to every other network and the router connects to every other laptop (BTW this page is ranking first on google for my search terms, at least in India)

 

[vivek.krishnan]

This had happened to me about 2 years back with a laptop bought from the US. It was a HP laptop and had an Atheros card. Eventually, connected via wire.

 

[artikle]

This had happened to me about 2 years back with a laptop bought from the US. It was a HP laptop and had an Atheros card. Eventually, connected via wire.

Did it work with wireless afterwards ? The problem is it used to work before but suddenly not

 

[vivek.krishnan]

Do try changing the channel to a number between 1- 10, and also see if you can enable 802.11g only mode on your laptop.

 

[vivek.krishnan]

Did it work with wireless afterwards ? The problem is it used to work before but suddenly not

I literally did all I could at that time. Changed WiFi channels, tried updating the router firmware - was running stock on the N13 - not DD-WRT, went to the extent of updating the drivers for Windows. All NADA. Never got it to work. It was surely a fault of the laptop - since everything else worked, plus Atheros chipsets are pathetic with respect to driver updates IMO - compared to Intel or Broadcom.