How to recover a files which are encrypted by ransomware

As I'm using a windows 7.We are configured public ip to access our apache server. After a Remote desktop connection via Anydesk Ended. All the Files in System are encrypted with .deep extension. Every Folder Contains Text files that has id and mrdeep@protonmail.com and bitcoin donate information and also system already has K7 AntiSecurity(Licensed but about to end).But after affected, K7 automatically vanished. Hence can anyone help me to recover those files and also guide me to escape from such viruses in future..