Cryptolocker is still infecting and encrypting hard drives on a regular basis.

I have written articles on Cryptolocker previously. 

Can you stop it running through a software solution ?

Try CryptoPrevent  and or Malwarebytes Prevention but there is no long-term guarantee these will continue working as the Crypto variants are continually evolving. 

You need to backup and my strong advice is a regular offsite backup that is not connected to your computer 

Stop opening emails that are not meant for you.

I would also route your email through Gmail as Google appear to be doing a good job at flagging these emails that are causing computers to be infected.

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