Windows 7 Wired Connection No Internet But Wireless Works

Solution: Run Rizonesoft Complete Internet Repair and set a fixed IP on the PC. Just doing the fixed IP should have worked but it would not. Four of the PCs are Windows 7 and three are XP. They worked fine for awhile but one day computer after computer needed to have a fixed IP set to get internet. The XP machine's internet speed increased dramatically with a fixed IP. Now they are all fixed and happy.

I'm leaving this for posterity:
I have 7 computers that hook to a second router in a two router network. The second router hooks to the first router which is connected to the cable modem and to several other machines. So the second router handles a network within a larger network and wireless radio is turned off.  One of the 7 Windows machines on the second router stopped accessing the internet through the wired connection. Adding a wifi connection to the problem PC connects it to the first router and internet works. The problem PC sees the other computers and accesses them fine but no internet. Virus does not appear to be the problem.

I am stumped so far. Below are some things to try.

The first router is 192.168.0.1, the second is 192.168.2.1, When set to auto select IP the problem computer picks up a 192.168.0.xxx IP. It seems like the second router is passing this computer straight through to the first router and that router is assigning the IP. Setting the problem PC to a fixed IP of 192.168.2.xxx does not produce internet.

Start - All Programs - Accessories and right click on Command Prompt, select "Run as Administrator" to open a command prompt.

Do First
ipconfig /flushdns
ipconfig /registerdns
ipconfig /release
ipconfig /renew
net stop "dns client"
net start "dns client"
Reboot

if not work

Do this

Reset WINSOCK entries to installation defaults: netsh winsock reset catalog
Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log
Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log
netsh interface ip delete arpcache
Reboot

Run these on working computer and compare to non-working
Minitoolbox
http://download.bleepingcomputer.com/farbar/MiniToolBox.exe

Hijackthis
http://www.trendmicro.com/ftp/products/hijackthis/HijackThis.exe


FarbarServiceScanner
http://download.bleepingcomputer.com/farbar/FSS.exe

Rizonesoft Complete Internet Repair
http://www.pendriveapps.com/goto/HERE/6635/1