Just days before a big race, an up-and-coming Nascar team suddenly found the crew chief's laptop going haywire and all the team's critical files locked up.
The team was the victim of a ransomware attack, a type of virus that locks up computer files until money is paid.
"A message popped up that said my files had all been encrypted. ... The only way to get it back is to pay a ransom," said Dave Winston, the crew chief for Circle Sport-Leavine Family Racing.
Ransomware cost Americans between $24 million and $28 million in 2015. It's growing exponentially, according to the FBI.