For those in need, here is an instruction on ho to remove the cryptolocker virus with the help of Malwarebytes: http://privacy-pc.com/how-to/remove-cryptolocker-virus.html
After that you will need to deal with encrypted files. I it is written in the article, one can try Windows feature Restore-previous-versions but seems like it is not always possible. I understand that it is not possible to decrypt files without private key but it is possible to restore deleted files using special tools law enforcement use - forensic tools. I've heard some computer repair service successfully use them too.
