Pop "ipconfig/all" into a command prompt and confirm that for the wired adapter connection:

The IP address and the Default Gateway are on the same network.

I would normally advise a ping to the default gateway or to 127.0.0.1, but I have no idea of the wireless setup and its associated settings and whether or not it will be giving the response.

The subnet mask is appropriate for the IP Address. For example, if the IP starts 192.xxx.xxx.xxx then 255.255.255.0 is the correct mask.

To be honest it might be easier if you PM me your ipconfig/all data. At least that way I can let everyone else know whether or not it's valid and proper.

C:\Windows\system32>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : YoungFamily
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : 520b.com

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 00-21-70-4F-78-E2
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::7156:7d10:3ad8:e7e%13(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.14.126(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 419438960
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-AE-37-2D-00-24-2B-C8-78-4D

DNS Servers . . . . . . . . . . . : 212.74.112.66
212.74.112.67
NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . : 520b.com
Description . . . . . . . . . . . : Dell Wireless 1505 Draft 802.11n WLAN Min
i-Card
Physical Address. . . . . . . . . : 00-24-2B-C8-78-4D
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d09f:beb4:f310:e7c6%10(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : 13 January 2011 09:46:44
Lease Expires . . . . . . . . . . : 14 January 2011 15:13:46
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 184558635
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-AE-37-2D-00-24-2B-C8-78-4D

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

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{C963522C-7410-4FCB-A708-1463326E0
618}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 7:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 11:

Connection-specific DNS Suffix . : 520b.com
Description . . . . . . . . . . . : isatap.520b.com
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5efe:192.168.1.2%15(Preferred)
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Disabled

C:\Windows\system32>

In reply to a post by glashan:

C:\Windows\system32>
Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 00-21-70-4F-78-E2
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::7156:7d10:3ad8:e7e%13(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.14.126(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 419438960
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-AE-37-2D-00-24-2B-C8-78-4D

DNS Servers . . . . . . . . . . . : 212.74.112.66
212.74.112.67
NetBIOS over Tcpip. . . . . . . . : Enabled

These settings are messed up. Just set it to Automatically Assigned.
I'm surprised Windows didn't offer to fix this itself.

This data from your wireless connection is good:

IPv4 Address. . . . . . . . . . . : 192.168.1.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1

I would got into the network sharing center, right click the local area connection, select properties and specify the same settings. If that won't work, try changing the local area connection's IP address to 192.168.1.3 instead.

Thanks, tried this but no luck.

Can you post another ipconfig /all please?

Are you trying to used wired and wireless at the same time on the same machine?

Have you tried reinserting the cable or a known working cable?

Odd that it assigning Tiscali DNS server IP's on the LAN.

Have you logged in to the router and checked that DHCP is switched on for the LAN?

can you confirm the ip address you are getting please?

Have you tried turning it off and on again?

In reply to a post by BatBoy:

In reply to a post by glashan:

Autoconfiguration IPv4 Address. . : 169.254.14.126(Preferred)

there's your problem. 169.254.14.126