HP 250 G2 Notebook PC - Manual (Page 69)

For more information about computer viruses, type viruses in the Search box in Help and Support.
Using firewall software
Firewalls are designed to prevent unauthorized access to a system or network. A firewall can be
software you install on your computer and/or network, or it can be a combination of both hardware
and software.
There are two types of firewalls to consider:
● Host-based firewalls—Software that protects only the computer it is installed on.
● Network-based firewalls—Installed between your DSL or cable modem and your home network
to protect all the computers on the network.
When a firewall is installed on a system, all data sent to and from the system is monitored and
compared with a set of user-defined security criteria. Any data that does not meet those criteria is
blocked.
Installing software updates
HP, Microsoft Windows, and third-party software installed on your computer should be regularly
updated to correct security problems and improve software performance. For more information, see
Updating programs and drivers on page 53 .
Installing Windows security updates
Updates to the operating system and other software may have become available after the computer
left the factory. Microsoft sends out alerts regarding critical updates. To protect the computer from
security breaches and computer viruses, install all critical updates from Microsoft as soon as you
receive an alert.
To be sure that all available updates are installed on the computer, observe these guidelines:
● Run Windows Update as soon as possible after you set up your computer. Select Start > All
Programs > Windows Update.
● Run Windows Update monthly thereafter.
● Obtain updates to Windows and other Microsoft programs, as they are released, from the
Microsoft website and through the updates link in Help and Support.
Installing HP and third-party software updates
HP recommends that you regularly update the software and drivers that were originally installed on
your computer. To download the latest versions, go to
http://www.hp.com/support . At this location,
you can also register to receive automatic update notifications when they become available.
If you have installed third-party software after you purchased your computer, regularly update the
software. Software companies provide software updates to their products to correct security problems
and improve functionality of the software.
Securing your wireless network
When you set up your wireless network, always enable security features. For more information, see
Protecting your WLAN on page 21 .
Installing software updates 59