at the bottom right corner of your screen letmesleep your see some little pictures, there called icons, hover your mouse over each 1 until a little name pops up, that will tell you what each icon is and usually gives an indication of what it does, 1 of them maybe a firewall, if so itll say what firewall it is, of course its also a possibility that as you dont know what a firewall is and your a vista user your may only be using the default windows firewall and not an independant program, once you,ve established that come back here and let us know :-)
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