Don't open an Valentine's Day e-cards over the next few days unless you know who they're from – and even then, be wary. As usual malware authors are cashing in on people's emotions by delivering viruses dressed up as innocent greetings.
The FBI is warning computer users that the notorius Storm Worm has resurfaced in the guise of Valentine's Day cards, installing a trojan on to users' computers.
The malware has been active for some time, rearing its head at every major holiday when it poses as an e-card.
Users who click on the link displayed risk having a trojan installed on their computers which can then link them into a global botnet.
It could also help malware creators steal users' identities.