This looks like a new version of a Ransomware infection.
Navigate to this topic.
Submit a sample of the compromised files for their review.
They will reply and let you know what you are dealing with.
From what we know now, your files are not recoverable.
Your only solution would be to restore the files from a good backup if you have one.
The compromised files can be transferred to a CD or Flash drive.
Should a solution be found in the future you may be able to restore them.
If you have problems with running this computer download and run this tool.
I will check your logs and advise.
Download the Farbar Recovery Scan Tool (FRST).
and save it to a folder on your computer's Desktop.
Double-click to run it. When the tool opens click Yes to disclaimer.
Press Scan button.
It will make a log (FRST.txt) in the same directory the tool is run. Please copy and paste it to your reply.
The first time the tool is run, it makes also another log (Addition.txt). Please attach it to your reply.
How to attach a file to your reply:
In the Reply section in the bottom of the topic Click the "more reply Options" button.
Attach the file(s). A 2 Steps process.
Select the "Choose a File" navigate to the location of the File.
Click the file you wish to Attach. <- Step 1.
Click Attach this file. <- Step 2.
Click the Add reply button.
Please post the logs for my review.
Wait for further instructions
This program is updated often.
If it's identified as suspicious by your Anti-Virus program trust it if Downloaded from the link I provided.
You should restore the program from the Quarantine folder.