As an alternative, you can get new hard drives and save the old ones just in case a fix is available in the future. The process is the same - install OS, install software and restore data.
Carbonite has at least three versions of the backup availabe. They also have the capability to do an image backup which is a complete copy of the entire hard drive but this requires a local external drive connected to the PC
I got Cryptowall on a business PC. There was nothing I could do but scrap the system. They had disabled access to all external media and the DVD. Couldn’t reinstall anything.
I paid for Carbonite and had an attack after a couple of years. They were unable to retrieve anything because I could not come up with a password they required.