|The 100 websites most affected by viruses each have about 18,000 nasties to attack net users' computers, an internet security company says.
Simply visiting one of the "Top 100 Dirtiest" websites - without downloading or even clicking anything - could expose your computer to infection and put your personal information into the hands of criminals, anti-virus software company Norton Symantec said.
Company spokeswoman Natalie Connor said the list was compiled using global data collected on Norton Safe Web, a site that analyses websites' security risks and has 20 million users providing site reviews.
The top 100 infected sites had on average 18,000 threats and 40 per cent of the sites had more than 20,000 threats.
A staggering 75 per cent of websites on the list were found to be distributing "malware" for more than six months.
Malware is malicious software that can damage or compromise a computer system without the owner's consent.