Around 24 hours after being hit by the big malware attack that affected 100 countries, 97% of UK hospitals were back to normal.
There is talk that the computers were breached through a vulnerability in older Microsoft systems which was long ago identified by the NSA and which the NSA included it in its list of cyber weapons. The NSA information was leaked earlier this year.
According to the FBI, ransomware attacks are up 300% since last year.
Most computer infections have the same MO as always: a user clicks on an attachment in an email that installs the malware, or that "patches" aren't updated on systems when vulnerabilities come to light.
One way to protect computer information: Regularly back it up on an external drive or the cloud -- somewhere secure.