Around 23 per cent of home computers are infected with viruses and other malicious software according to a survey by AusCERT, Australia’s national computer emergency response organisation based at Queensland University.
Their survey of 1001 home computer users across Australia found that, while 94 per cent of respondents had antivirus software installed, only a small number were taking other vital steps to prevent malware infections.
The survey found 35 per cent of home computer users were downloading content from high risk file sharing websites such as Limewire.
AusCERT reports that a large proportion of malware is now being developed specifically to extract personal information for financial gain.
They estimate that close to one quarter of regular home computer users have had some kind of sensitive, personal information captured.
This is alarming when 84 per cent of users reported using their computer for internet banking.
Around half of all home computer users also reported leaving their computer connected to the internet all of the time.
Leaving a broadband-connected computer on for long periods of time increases the window of opportunity for attackers.
AusCERT recommends that broadband users switch their computer off when it’s not in use.
They also recommend only using an administrator account on a home computer for tasks such as installing hardware and software.
At all other times when accessing the web or email, a limited user account should be used.
Use ‘strong’ passwords with a minimum of 8 characters and include a mix of upper and lowercase letters as well as numbers.
Computers should also be configured to run automatic software updates for all major software on the computer including the operating system, web browser and anti-virus software.
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