Lost Internet connection

I have upgraded from shitty vista to xp sp2 and i do not have an internet connection anymore. it was working before but then just stopped working. Can anyone help. I have an Hp slimline s3100n desktop with
[ NVIDIA nForce Networking Controller ]

Network Adapter Properties:
Network Adapter NVIDIA nForce Networking Controller
Interface Type Ethernet
Hardware Address 00-1B-FC-C4-4E-D0
Connection Name Local Area Connection
Connection Speed 100 Mbps
MTU 1500 bytes
DHCP Lease Obtained 12/25/2007 1:24:55 PM
DHCP Lease Expires 1/18/2038 10:14:07 PM
Bytes Received 247188 (241.4 KB)
Bytes Sent 21748 (21.2 KB)

Network Adapter Addresses:
IP / Subnet Mask 169.254.106.131 / 255.255.0.0
DHCP 255.255.255.255

Network Adapter Manufacturer:
Company Name NVIDIA Corporation
Product Information http://www.nvidia.com/view.asp?PAGE=nforce
Driver Download http://www.nvidia.com/content/drivers/drivers.asp

 

Give these things a shot:
http://support.microsoft.com/kb/314850/en-us
http://support.microsoft.com/kb/811259/en-us
http://support.microsoft.com/kb/299357/en-us
What about trying a different browser? Or maybe Safe Mode with Networking?