Don't worry about it, if your files were backed up you'll be alright. Perhaps you should see this as a good chance to boost your security and privacy, tell your family that too. After all, bitcoin is money, and if you're keeping money in your computer you'd better learn good security practices. Family members of mine have never caught a virus on their computers after I helped them with software and advice.
Atleast this is a sucess history against the hackers,usually the attacks gets all the data and people pay them to recover and keep vulnerable to another attack on the short time,the extorsion will always happen if you pay them.And well is bad for the image of bitcoin,your family now knows that besides bitcoin its amazing and good there are people damaging it without look behind.