Hackers somehow got ahold of a malware exploit that was developed by the NSA and used it to attack the city of Baltimore. The malware, a ransomeware exploit known as Eternal Blue, was taken home by an NSA contractor, and Leo says that Kaspersky antivirus quarantined the malware and then sent it to the home office in Russia.
Chris has a Dell laptop that got hit by the CyptoWall Ransom Ware. He was able to use ShareExplorer to recover some of his files, but he lost a lot of them because he refused to pay the ransom. So he has a bunch of files that are encrypted. Can he use something to unencrypt it? Leo says no. CryptoWall uses strong encryption and there would be no guarantee it could be fixed. This is why he should backup all of his data. Sometimes, an uneraser can recover data since CryptoWall erased the original and encrypted a copy. But outside of that, he's out of luck.
Linda has a Windows 7 machine that has been infected with malware. Leo says that ultimately, it's probably best to use the recovery discs that came with the computer. Most OEMs don't include original Windows install discs, but usually offer recovery discs. She could try cleaning the malware off, but usually malware invites more viruses, so it's the malware she doesn't know about that she should be concerned about.
Ann got bit by the FBI MoneyPak virus. This is a scam called ransomware. The virus locks down a computer and won't allow the user to use it until they send them money. It's definitely not the FBI. The only way to get rid of it is to format her drive and reinstall Windows from a known, good source. It will also help if she uses an updated OS like Windows 7.
Davey got bit by the ransomware virus which demands he pay $300 to unlock his computer. Leo says do not be fooled. Just format the PC and reinstall Windows. He can try and remove it, but he'll never know if there's other viruses that have been installed as well. Reinstalling Windows is the only way to be sure it's been removed.