Computer outfit Sophos is warning about a particularly nasty file promising a PowerPoint presentation of sexual positions from the Kama Sutra.

Those who want to see people twisting into tricky sexual positions don't get to see much but what they do see is a booby trap. As they look a backdoor Trojan called Troj/Bckdr-RFM is installed which allows hackers to gain remote access to your computer."

Sophos has warned that once a computer is infected with the malicious software, the hacker can steal personal information and spy on users' activities or use the machine for nefarious deeds such as sending spam or attacking websites.

Still you do get to see half dozen lovemaking techniques illustrated from the ancient Indian text before your computer turns to sludge. It is up to you to decide if that is worth it.

Faced with the way my machine is behaving at the moment, I would swap it for a stack of Medieval Indian porn.