Hi, I'm Darko, 28 years old male from Croatia. I would like to assist you with this project until you are fully satisfied. I'm new to Freelancer.com but i assure you I am professional who gets the job done.
Zepto virus works hidden until encrypts all the files. If that happened then im afraid its too late.
It is possible to try get original data back with undelete software or try to unlock encrypted zepto files but i cant say it will be sucessful. Anyway, i can try all that but first clean computer from everything and give you advice to never again have your (or clients) computer affected with virus or malware or anything like it.
Best regards,
Darko