Here is the description of the hardware and the steps I took to resolve the title issue...without success :(
Windows XP Home, Gateway laptop
Lynksys WRT300 Router, no encryption no mac filtering
Lynksys Wireless adapter 300N serries
Customer wireless not connecting with internet access. Tried Linksys software and Zero Config (Windows) to manage wireless connections.
ipconfig /all shows the Wireless adapter without a Default gateway. But it has an IP and valid DNS servers.
Plug in an ethernet cable while the PC is on and it connects and congifures fine with internet access.
Restart the computer and neither device gets a default gateway.
Remove the cable from laptop (problem machine) and connected to a desktop with TCP\IP setting set to automatic and it does fine, even after a restart.
I then ran the netsh int ip reset resetlog.txt command to reset the TCP\IP stack. Then I had customer reboot. Wireless card again did not obtain default gateway. Reconnected Ethernet cable and it picked up fine.
Remove all Linksys software and let windows reinstall the hardware. After completing install customer used windows to connect to available wireless networks and it said it was connected fine. No connection to the internet though. Ipconfig /all revealed the default gateway was blank again (still)
I could not try another external card or flash the router because I was working remotely.
This is an issue all over the place for years and no one seems to have posted a valid resolution or explanation.
Because I cannot readily apply any solution suggestions I will have to award points based on the likelihood of the solution based on the explanation and supporting ideas or facts
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