wireless usb card

My pc is a Dell Vostro 220 and the OS is win 7 Prof 64 bit (I upgraded it).  Does anyone know if this pc has a wireless built into the pc.  If NO, then I intend to purchase a wireless usb card to connect to the internet.  This is because, strange as it sounds, but my direct connection by ethernet to my Verizon FIOS router, the speed for Download is 3.624 and the speed for Upload is 20.41 Mbps.  
My HP laptop which I connected wirelessly gives me a download speed of 29.38 and the upload of 24.61.  
Why the above results, I have no clue.
Thus, I am planning to buy a wirless usb card to see if my speed improves because my connection to the internet takes a long time to load the pages or play any video from youtube.com.
My ISP is verizon FIOS
If my above plan to get a wireless usb card is a good try and fix, hope the Gurus could please advise, based on my pc model and OS configuration what speed I should go and also the Brand name.  As I am on a budget so please give me some choices.  Thank u.
jegajothyretiredAsked:
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Raymond PengSystems EngineerCommented:
Easiest way to find out is to fill out the service tag info here:

http://www.dell.com/support/troubleshooting/us/en/19/ProductSelector?dgc=ST&cid=68494&lid=1724550

it will relay back to you the specs of your laptop.
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Darr247Commented:
Click the orb/start button, type in devmgmt.msc and click the one that appears at the top under Programs (1)
Expand the Network Adapters category
Is there a wireless adapter listed?

Dells usually toggle wireless on/off with Fn+F2, but there might also be a separate switch for it. Further, there should be an option in the BIOS to disable it... Press F2 for Setup while that message appears at startup, and look through the hardware settings.
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jegajothyretiredAuthor Commented:
In response to Dar247, I see a Realtek PCIe GBE Family Controller.  Is this a wireless adapter? I have no clue. Thank u.
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Raymond PengSystems EngineerCommented:
that's not it..that's your NIC controller where you physically plug in a network cable.  You'll need to purchase a usb wireless adapter.  Refer to links above - positive reviews.
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jegajothyretiredAuthor Commented:
excellent, thank u
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Darr247Commented:
Did you look in the BIOS to see if there was a wireless card already there, just disabled?

e.g.

Wireless Adapter in Dell BIOS
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