Antivirus Tip: A computer virus replicates itself by changing the code in other programs to copy itself across a computer system.

Antivirus Tip: There are several different types of viruses and they all behave differently, including how they spread: virus, trojan and worm.

Antivirus Tip: Restarting your PC in safe mode disables some of the functions that viruses use to replicate, allowing your anti-virus more resources to work.

Antivirus Tip: Create a secondary e-mail account to ensure that you have a backup should a virus prevent you from changing your password via e-mail.

Antivirus Tip: Whenever possible, keep your anti-virus software up to date, as new software means new weaknesses become apparent and must be patched.

Antivirus Tip: Install specialist anti-autorun software, as many viruses attach themselves to drives and copy to whatever is connected to the system or network.

Antivirus Tip: Disable image and file previews in your e-mails as some attachments allow trojans to activate and infect your system or device.

Antivirus Tip: Save a file of your system’s default settings, so that should you need to restart after clearing a trojan, you have your settings available.

Antivirus Tip: A trojan virus is misleading, as it appears as a helpful program, but actually installs several harmful programs and slows down your system.

Antivirus Tip: Installing real-time anti-spyware can protect against malware from installing itself and logging your keystrokes without you realising it.