First deletion isn't really a good first option (you have none left), 'first do no harm' don't delete, send virus to the chest and investigate.
It is System Volume Information not 'sound' this folder is usually hidden so you nee to 'show hidden files and folders' in Explorer, Tools, Folder Options to see them.
The C:\System Volume Information folder is a part of the system restore function and as such is protected by windows, the only really effective way to clean infected _restore points is to disable system restore and reboot. This will clear ALL _restore points. Once you have disabled system restore, reboot, scan your PC again and if clear enable system restore.