E2000 router meets Fry's USB Adapter

Question

Hello:
Purchased my first router -- yeah!  Cannot make my old XP machine to work -- bummer.  I bout a Fry's USB adapter.  I loaded it.  The manager sees a signal from the router.  However, when I try to connect, I cannot.  I tried switching the router from WPA2 to WEP but it did not help.  I called Fry's help desk.  They said to set up a "network" in my router and set it to zero security and see if I get a signal -- sounds like drastic diagnostic testing to me.
Has anyone used Fry's Adapter with E2000 successfully?  Thank you.

Answer 1

Thank you for your time.  I will try it after Chrismas.  Why wait?  Well, I bought a netbook. 
Last night I fired it up, and after resetting the router to WPA2 and some minor wrangling with the router and the netbook, the netbook connected and is up and running -- 5 minutes tops.  It is a present so I want to make sure it is working on Christmas day.  It uses XP, SP3, just like the desktop I am trying to connect.  So, I went back to trying to connect with Fry's adapter and hoping things had changed, but nothing.  Keeps saying "trying to connect" even though it shows almost all the signal bars lid.  By the way, the Fry's manager also sees four other signals (probably my neighbor's services).   I am wondering if it is McAfee that is causing the problems.  I had asked Fry's about this before and they said no.  The netbook also has McAfee installed but I did not launched it although it seems some form of it is already running.
So, all this would lead me to believe that the problem is with Fry's adapter, and or settings, and possibly the McAfee Security Center on this desktop?  Any additional thoughts based in this new info? Please let me know.  thank you.