The Greek siege of Troy had lasted for ten years. The Greeks devised a new ruse: a giant hollow wooden horse which was filled with Greek warriors led by Odysseus. The rest of the Greek army appeared to leave, but actually hid behind Tenedos. Meanwhile, a Greek spy, Sinon, convinced the Trojans that the horse was a gift the Trojans accepted the gift.
In ancient times it was customary for a defeated general to surrender his horse to the victorious general in a sign of respect. It should be noted here that the horse was the sacred animal of Poseidon.
The Trojans hugely celebrated the end of the siege, so that, when the Greeks emerged from the horse, the city was in a drunken stupor. The Greek warriors opened the city gates to allow the rest of the army to enter, and the city was pillaged ruthlessly, all the men were killed, and all the women and children were taken into slavery.
this is the history which surrounds the Trojan virus of today!