Computer security is protecting your computer and its contents
against people or other computers gaining access to it.
Prevention measures help you to stop unauthorised users (intruders
or hackers) from accessing any part of your computer system.
Detecting intruders and hackers helps you to determine whether
or not someone attempted to break into your system, if they were
successful,and what they may have done.
Remember you are responsible for what your computer does whilst
you are logged on.
A firewall can help protect your computer and make it more secure
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For more information on firewalls, see our guide
Its worth noting that no matter what you do it is impossible
to completely secure your PC. We recommend that you always back
up your computer regularly. Find out more about backup