The Federal Bureau of Investigation issued a warning Tuesday saying that all the romantics across the United States should be aware of a malicious computer worm spread through Valentine’s Day e-cards.

"If you unexpectedly receive a Valentine's Day e-card, be careful," the Federal Bureau of Investigation said in a statement, warning Internet users to "be on the lookout for spam emails spreading the Storm Worm malicious software (malware). The Storm Worm virus has capitalized on various holidays in the last year by sending millions of emails advertising an e-card link within the text of the spam email. Valentine's Day has been identified as the next target," the FBI said, according to the Agence France-Presse.

How the virus gets into one’s computer? It’s very simple. Once the recipient receives the email, he is then directed to click on a link to retrieve an electronic greeting card (e-card). After the recipient clicks on the link, malware is downloaded to the Internet-connected device and causes it to become infected and part of the Storm Worm botnet. A botnet is a network of compromised machines under the control of a single user.

A similar warning was issued by security software Trend Micro on Monday.

“As we had already forecast last month, Storm is already sending their Valentine greeteings this week. The owners of this powerful botnet are doing as much as possible to [sustain the number of compromised machines at their disposal]. This includes spamming people and making tem click on malicious links. This time around, the messages are of love,” security researcher David Sancho said in a blog post.

Anyone who has ever received such an e-mail is advised to file a complaint at Internet Crime Complaint Center.