Yes, I have heard of it before. If you know how to remove it, why don't you? I wouldn't recommend keeping it on your computer since it could just slow things down.
I would recommend reading this guide if you need help removing it:
http://guides.yoosecurity.com/how-t...ked-pc-asked-for-payment-100-pounds-or-euros/
I wouldn't say 100% that you are fully secured but if you haven't noticed anything suspicious, it's a possibility the RAT may be removed.
I'd recommend checking if you have any incoming connections that are established via CMD.
To do this, open up CMD and type the command "netstat -n" without the quotations. Take a screenshot or jot down any unfamilar IP addresses which show an "Established" state.
By the way, those top two processes in your task manager are legitimate Windows processes and the bottom two processes are Nvidia software processes so don't worry about those.