Gateway NV51B User Manual page 66

Windows Firewall
Windows has a firewall that protects your computer when connected
to the Internet. It stops programs from accessing the Internet without
your permission.
Certain programs need access
to the Internet to function
properly, or even to function
at all. If this is the case, you
will usually be asked to allow
access when you install a
program, or the first time you
use it. To check firewall
settings, click on Start
Control Panel > System and
Security > Windows Firewall.
Note: When you first start to use a Firewall it is in a 'Learning
mode', you may see pop-up windows alerting you that certain
programs you know and trust wish to access the internet. After a
period of time the Firewall will know your list of trusted programs
and won't ask for permission the next time the program tries to
connect to the internet. The Firewall also protects your computer
from programs from the internet trying to access your computer;
this sometimes is necessary to allow access for program updates,
downloads, etc.
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