you still did not tell us how your wireless router in your home is setup! is it setup unecrypted or encrypted requiring a WEP key to be entered??
try the below tip from Lorjack and see if it solves your problem
Re: Can't connect to the internet
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Reset the TCP/IP stack in addition to WINSOCK entries.
Windows XP
Open up a command prompt (Start > Run > CMD)
Type the bolded commands in the command prompt window:
Reset TCP/IP Stack: netsh int ip reset reset.log
Reset WINSOCK entries: netsh winsock reset catalog
When finished reboot
If it still doesn't connect then
Supply the following information please.
OS running on all affected systems
Make & models of all equipment (routers, network cards, modems).
Wired or wireless?
What wireless encryption is in use? (WPA, WPA2, WEP, None)
Browsers being used (Firefox, IE, Safari, Opera,...)
What security software is installed? (Firewalls, AV, Spyware, Malware,...)
Open up a command prompt (Start > run > cmd)
Type the following bolded commands and post the results for each affected machine.
ipconfig /all
ping
www.google.com
ping 74.125.53.99
Note: To post results of commands, alternate click on the top of the command prompt > edit > select all >
alternate click on the top of the command prompt > edit > copy > paste in a message here. If you are on
a computer that can't connect to the internet then paste the contents in a text document and save it to a
portable media like a flash drive, then use an internet capable machine to post the contents.
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