The IT Stuff

A buffer overflow, or buffer overrun, is an anomalous(differs from expectation) condition where a process attempts to store data beyond the boundaries of a fixed-length buffer. OR
It occurs anytime the program writes more information into the buffer than the space it has allocated in the memory. In buffer overflow attacks, the extra data may contain [...]

Anti-Virus and Anti-spyware Protection:
Detects, blocks, and removes viruses, spyware, adware and rootkits.
Network Manager:
Lets you easily fix security issues on your home network from one PC. Provides easy and automatic printer and file sharing across computers on your home network that you trust.
Web Site Safety Ratings:
Adds safety ratings to sites and search engine results based [...]

Antivirus and Antispyware:
Antivirus and Antispyware scan for both viruses and for security risks.
Personal Firewall:
The Symantec Endpoint Protection firewall provides a barrier between the computer and the Internet.
Intrusion Prevention:
The intrusion prevention system (IPS) is the Symantec Endpoint Protection client’s second layer of defense after the firewall.
Proactive Threat Scanning:
Proactive threat scanning uses heuristics to detect unknown threats. [...]

Malware  includes spam, viruses, Trojans, worms and spyware
Malware can get into your computers network via two main routes:

Desktop Computer( Through disk sharing or on USB memory sticks)
Network (through the internet gateway,web proxy server (for web usage) and/or mail server (for email))

To ensure all your entry points are secure you should consider security at all [...]

Use a high-quality anti-virus program, and be sure to update it regularly. Use it to scan any files, programs, software, or diskettes (even new software from a commercial company) before you use them on your computer.
Make back-up copies of important documents or files and store them on separate diskettes. Making backups will also [...]