If you have any concerns for your home systems please see this page from the UK Government's National Cyber Security Centre

But the key to all security is;

 good passwords - different ones for each logon,

keeping all your software on the latest releases including the operating system,

 Multi-Factor Authentication & Authentication Apps. 

ALSO - AVOID BEING SPEARED, PHISHED or WHALED

DON'T CLICK BEFORE YOU THINK!

DO YOU KNOW THE SENDER?

ARE YOU EXPECTING THIS EMAIL?

DOES THE EMAIL ADDRESS MATCH THE SENDER NAME?

 DOES THIS LOOK & FEEL SAFE?

Free antivirus for home/personal devices can be found here;-

https://www.avg.com

https://www.avast.com

(Mac & PC compatible)