Computer and Network Security
There are litterally millions of viruses, spyware, and other malicious programs that will compromise your computers or network if they are not properly protected. It's not a matter of 'if' it will happen, but 'when'
The good news is networks and computers can easily be secured by using a firewall, and installing the appropriate antivirus and other anti-malware software.
Home Security
Luckily, there are several prog-rams available that are free for home use.
1stInstall a firewall for homes with
       'always on' high speed internet.
2nd - Secure your wireless network
       with encryption keys.
3rd - Install antivirus & anti-spyware 
       software on your computers.
4th - Surf responsibly.  Be cautious of
       underground websites, and files
       downloaded from file sharing
       (P2P/peer-to-peer) software.
5th - Adopt a Family Internet Safety
       stratagy.  Set up internet con-
       trols and user accounts to help
       protect your computers.
Office Security
Beyond the outside threats, you may also need to control access to your data.
1stProtect your network with a
       firewall, and wireless encryption.
2nd - Install an ethernet network and
       narrow the point of entry to your
3rdProtect your computers with
       antivirus and user accounts.
4thSecure your data, network, and
       printers by installing a Windows
       Server domain.
5th - Back up your data! Too many
       people have lost endless hours of
       hard work, simply because they
       were not prepared.
Enterprise Security
Simplify administrative tasks for your system & network security with modern tools.
 - Centralize security software with
   Symantec Endpoint Security, Sophos
   Antivirus, or Faronics Antivirus.
 - Use system 'lock-down' technologies
   such as Faronics DeepFreeze, to
   prevent changes to any computer.
 - Share and access files, printers, and
   applications securely with Microsoft
   Windows Server Systems