Web users searching for clips of tennis player Serena Williams' outburst are being warned that they could be putting themselves at risk of unwittingly downloadaing malware.

Security firm Symantec said that some search engines are directing users looking for the term 'Serena Williams Outburst' to a domain called pixnat.com.

According to Symantec the website may look genuine but it is actually hacked and hosts fake antivirus scanners.

"Unwary visitors to this site will instantly see browser windows pop-up warning them of various security threats, before being offered the chance to download a program that will fix them. They should refuse this as this is fake antivirus software that could harm their computers," said Hon Lau, senior security response manager at Symantec.

Hon Lau said hackers are taking advantage of people's natural curiosity with the attack, which is also known as 'SEO poisoning'.

"It is a small attack at the moment, but serves to show how dangerous misleading applications can be. They might look like legitimate software, but they're there to harvest your personal details and hold your computer to ransom. Unless they want to put themselves at risk of identity theft or fund organised crime we'd advise users to stay well away."

Broadband speed test

PC Security advice

See also: Hoax antivirus pop-ups on New York Times website