Microsoft is urging Windows users to install a free piece of security software, following the discovery of a “zero-day” vulnerability in Internet Explorer, which hackers are currently exploiting to remotely hijack computers
The bug is found in versions 7, 8 and 9 in Internet Explorer and is believed to be the handy work of highly-skilled software bods as the system is so complex.
"We're aware of targeted attacks potentially affecting some versions of Internet Explorer," Microsoft said in a statement.
In response to the attacks, the firm has issued a free security software download (available here) designed to keep users safe while it concentrates on rolling out a concrete fix.
The bug was discovered by researcher Eric Romang on Friday, when his computer was infected by a piece of malicious software, dubbed Poison Ivy, which is used by hackers to remotely hijack PCs and steal data.