January 20, 1999 The Happy99 worm first appeared. It invisibly attached itself to emails, displayed fireworks to hide the changes being made, and wished the user a happy New Year. It was the first of a wave of malware that struck Microsoft Windows computers over the next several years, costing businesses and individuals untold amounts…

January 20, 1999 The Happy99 worm first appeared. It invisibly attached itself to emails, displayed fireworks to hide the changes being made, and wished the user a happy New Year. It was the first of a wave of malware that struck Microsoft Windows computers over the next several years, costing businesses and individuals untold amounts…

January 20, 1999 The Happy99 worm first appeared. It invisibly attached itself to emails, displayed fireworks to hide the changes being made, and wished the user a happy New Year. It was the first of a wave of malware that struck Microsoft Windows computers over the next several years, costing businesses and individuals untold amounts…

January 20, 1999 The Happy99 worm first appeared. It invisibly attached itself to emails, displayed fireworks to hide the changes being made, and wished the user a happy New Year. It was the first of a wave of malware that struck Microsoft Windows computers over the next several years, costing businesses and individuals untold amounts…