Bsnl wifi No internet access(Windows 7)?

Please have a look at what i am saying
Ok
i am using pppoe mode and using ZTE ZXDSL 531-B modem(wifi)
it connects fine
but suddenly Windows 7 shows no internet access or limited access
in the wifi settings i have set ip4 to obtain ip and dns automatially
and even if i filled that manually same problem occurs
When it shows no internet access The same connection works fine on my wifi mobile but not on my pc
It works all the time on mobile but giving problems on pc
This is what i get in command prompt ipconfig/all


Windows IP Configuration

Host Name . . . . . . . . . . . . : ________
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : Home

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . : Home
Description . . . . . . . . . . . : Intel(R) WiFi Link 1000 BGN
Physical Address. . . . . . . . . : 00-1E-64-23-C2-5C
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::85a6:201f:ec63:49b2%14(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 12 November 2011 13:09:00
Lease Expires . . . . . . . . . . : 13 November 2011 13:12:37
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 318774884
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-16-4E-9E-BD-00-26-2D-63-B2-90

DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : Home
Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet
Physical Address. . . . . . . . . : 00-26-2D-63-B2-90
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.Home:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : Home
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
IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:899:ef0:3f57:fefd(Prefer
red)
Link-local IPv6 Address . . . . . : fe80::899:ef0:3f57:fefd%13(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled

please help me what to do with this?

This may help

http://www.indiabroadband.net/broadb...tml#post325614

When this incident happens, check the Wireless Network
settings and click Diagnose. and get the fault /error message.
In Windows 7 , if possible you can keep the LAN cable also connected.
to laptop.

http://www.indiabroadband.net/attach...iwifi-mode.doc