The invisible extension - what you can't see, can hurt you. By default, Windows does not have file extension viewing enabled. This allows virus writers to distribute executable files disguised as something non-executable.

Achieving good computer security can seem like a daunting task. Fortunately, following the few simple steps outlined below can provide a good measure of security in very little time.

Antivirus software is simply not enough. An email worm can spread worldwide in just minutes, but it takes hours for antivirus vendors to analyze, create, and deploy signature updates. Fortunately, there are five easy steps you can take to help close that window of vulnerability and help keep email worms off your system.

All disks and hard drives are divided into small sectors. The first sector is called the boot sector and contains the Master Boot Record (MBR). The MBR contains the information concerning the location of partitions on the drive and reading of the bootable operating system partition.

Securing your mail client is just one of the steps necessary to help prevent email worms and viruses. If you have not already done so, visit the Email Help Center for tips on spotting malicious attachments and the do's and don'ts of email security.

The Windows Messenger Service can be exploited by spammers and used to dish up unwelcome advertising on unsuspecting users. The service is also victim to a critical exploit that could allow malicious attackers to remotely run code on vulnerable systems.

Instant Messenger worms are becoming increasingly more sophisticated - and more prevalent. To avoid infection, treat IM as suspiciously as you should be treating email. There are some tips which will help you avoid infection.

The HOSTS file is the virtual equivalent of the phone company's directory assistance. Where directory assistance matches a person's name to a phone number, the HOSTS file maps domain names to IP addresses.

Plagued by spyware and adware that keeps reinstalling itself everytime you remove it? If you haven't kept your security patches up to date, the resuscitating spyware and adware may be the result of an Internet worm that reinfects your computer each time you access the Internet.

Hiding inside of every email is a header, showing each step of the email's journey from point A to point Z and every pass through in between. The steps to view an email header vary between mail clients.