Be very careful opening attachments from your e-mail. Even if it’s from someone you know or trust. Always make sure it’s a safe file and not questionable. The “crypto-locker” virus is very active still and even more infectious. It tends to infect a machine after opening an attachment in a fraudulent e-mail. Once infected, it will encrypt your files on your machine and spread across any other machines on the network and encrypt their files as well. These files often cannot be retrieved, and are permanently lost. Unfortunately, there are many other viruses that act similar and are just as infectious. Keeping a close eye on e-mail is paramount in keeping your machine safe from threats.