Since today is known for love, let’s look back 21 years to one of the more destructive, costly and famous viruses in history. The “ILoveYou” worm, also known as the “Love Bug” or “Love Letter For You” infected more than ten million Windows computers, beginning on May 5, 2000. This worm began spreading as an email message with the subject line "ILOVEYOU" and the attachment "LOVE-LETTER-FOR-YOU.txt.vbs".