A ZEPTO file is a ransomware computer virus utilized by cybercriminals. It contains a virus that copies files on your computer, encrypts them, and deletes the original files in order to force you to pay (most likely bitcoin) to decrypt them. ZEPTO files are similar to .LOCKY virus files.

This malware is highly dangerous and often transmitted through spam emails. They are difficult to locate on your computer, however, an indicator that your computer is infected is less space on your hard drive due to all of your files being encrypted. There is no program currently available to effectively restore your files if they are infected. If you backup your files you can execute a full system restore. Otherwise, the only known way to decrypt your infected files is to pay the perpetrator for the private key and decrypt program.