A computer attack that's been observed on the Eastern Michigan University campus may also pose a threat to your computer.
The university is warning of so-called "ransomware" called CryptoLocker, which EMU spokesperson Geoff Larcom says poses a serious threat.
Lacom says the attackers can grab your files, encrypt them and lock them away. The owner is then forced to pay a ransom to have their files unencrypted and returned.
CryptoLocker generally infests computers via fake email attachments disguised as things like FedEx and UPS tracking notices.
Larcom says it's always best to steer clear of emails and attachments you don't recognize, or didn't request.