The AirPort Express flashing yellow means it it not receiving a valid IP address. This is issued by your router.
I recommend disabling your Netgear's "Wireless Access List" until you get it resolved.
One thing that you did not mention is using AirPort Utility. You need to configure the Express using AirPort Utility for Windows. If you don't have that click here: http://support.apple.com/kb/DL1391
Read about designing AirPort Networks here: http://manuals.info.apple.com/en/designing_airport_networks_10.5-windows.pdf
A new Express creates an unprotected wireless network named "Apple Network xxxxx". You need to disconnect from your existing network and connect to that network in order for AirPort Utility to communicate with the Express. Most likely you will have to temporarily disable any and all anti-virus / firewall / security software running on your Windows to do this. If you don't see that network you will not get anywhere.
When you are finished configuring the Express in AirPort Utility, including addressing any unresolved conflicts it may report, click the button to restart it. AirPort Utility will say "the Express is now restarting" but the temporary network that it created for you to configure it will cease to exist, so just close the window. Reconnect to your usual wireless network which will now welcome the Express as a member.
After it restarts the Express should show a happy green light.
When you are finished re-enable all your Windows firewalls and AV software.
Thanks very much for responding. I forgot to mention that the only response I get from the Airport Utility is:
"AirPort Utility was unable to find any AirPort wireless devices. Make sure the AirPort wireless device you
want to set up is plugged in and in range of your computer, and then click rescan to try again."
When I click rescan it comes back with the same message. All other areas are blank and most menu items are grayed out. Does that help any?
Yes, it means you cannot even get to Step 1.
The problem is very likely to be Windows anti-virus / security / firewall software. There are so many varieties of them I'm afraid I would not know where to start, but that's the direction in which you should focus.
AirPort Utility must be able to find the Express to configure it.
If its LED is flashing yellow there is no reason to believe it is defective. Of course out-of-the box failures occur but they are rare - failed Express base stations are usually cold and dark.
If in doubt, reset the Express again - it is possible an incomplete configuration left it confused: Resetting an AirPort Base Station or Time Capsule FAQ
I solved my problem! A friend, who is a network specialist, has tried the Airport before in a corporate and home environment and only had limited success. He suggested I go and return mine and pick up a WiFi Range Extender. I did and within 5 minutes my iPad was connected and working great. I appreciate all the great responses to my inquiry. So thank you for being so responsive and helpful.