So! My father-in-law is a genius. The virus had just hidden all our files, and changed the filenames so we couldn’t find them. But he worked some kind of magic and now it’s all fixed. Well Zach is still working on unhiding some folders but basically it’s all ok. Yay!
Message is still valid though. Backups are important!
Bananas, continued 
YAY! Fantastic news!
Yay!