Do I need to run sort of tweak test?
Try here and get the free test / tool.
http://www.dslreports.com/tweaks
However, I will attempt to disable the XP Firewall on that interface. NAT from the router should be enough for a home-user (me).
Make certain you
can leave your firewall off, it is usually not a good idea. A quality firewall will protect you from
some viruses, block web-trackers, and 'free-ware' (that you "pay" for by letting it snoop around in your computer).
Look at this page for a great stealth tester http://www.grc.com/default.htm (since direct-links change I can't give one, you need to search for the word "ShieldsUP!").
If i had a wireless packet sniffer, I could try to determine if the packets are exiting the adapter at all... unfortunately, such equipment is only at work.
Try one of these:
Wireshark
http://www.wireshark.org/download.html
Microsoft Network Monitor 3.1
http://www.microsoft.com/downloads/details.aspx?FamilyID=18b1d59d-f4d8-4213-8d17-2f6dde7d7aac&DisplayLang=en
There aren't any pages that don't load. They are just not as fast as I want them to be. What is funny is, there is a laptop with an 802.11g card getting blazing speeds. Faster than my computer and another computer hard wired to the router. If I changed the 802.11 setting to "802.11 N" only, will I get better speeds with the USB adapter and still get connectivity with the 802.11g card?
There are a few speed testers here http://www.dslreports.com/tools
I like this one better: http://www.speedtest.net/index.php
If you
don't use "802.11 N only" then "N" will be slower.
If you
do use "802.11 N only" then "G" (and "others") won't work.
Roll your mouse over your "Wireless Network Icon". It should say
300 and not 54 (for best speed, and lowest compatability).