first of all thanks for your help.
I have a problem with my wireless connection to internet. the router is working just fine but the problem seems to be in my OS because each time I start the system or I reboot I have a message from sygate firewall saying that "System and Kernel NT" is trying to connect. I can say both allow or deny and the result is the same: my connection slows down.
even if the signal is maximum or very high I have a very slow connection.
Sometimes the "System and Kernel NT" doesn't pop-up and I have my normal speed but in these days I can't avoid it. it always start and I can't help it.
Do you know a solution or what could be the problem?
I'm using Windows XP Home edition service pack 2 version 5.1.2600
my router is a "Hamlet router adsl2"
please ask for anything else. I'm not expert of this stuff as you may have noticed
thanks to everyone.