Many people will format their drive when once it gets infected with virus. In case, if it gets infected by any virus, then there subsists numerous ways to secure them. Booting into the safe mode is an ideal option and this type of Trojan is general referred as Ransomware.
There were many Ransomware programs which would confine access to windows and will decrypt the files though they seem to be weak and easy to eliminate through safe-mode with networking process. This virus will operate even when you are in safe mode which depicts that it's not a start-up program. In case, if you have updated your PC freshly then it would be an advantageous to you, if not you can access through a Windows CD.
Another solution to eradicate this issue is to take the advice from the Trojan expert forum and just post your logs online so that the technical experts will assist you on how to obliterate the software. Exploit registry program or any antivirus for time being. If you find that your antivirus is helpless, then your computer would be easily infected within no time. In such pitiable cases, Trojan removal service would help you a lot in finding a better solution to your concern.