Increase in malware
Experts are seeing a surge in malware. McAfee says computer viruses were up in the the second quarter of 2012.
The computer security firm reports finding the largest increase in malware in the last four years. That amounts to a 1.5 million increase in malware from the first quarter.
McAfee says it also found an increase in mobile attacks, known as "drive-by downloads," like using Twitter in order to hack into a device and steal personal information from unsuspecting victims. Despite the emergence of new mobile threats, the report found that in the last quarter PC malware faced the most threats.
Ransomware is one of those growing threats. That's when malware takes control of personal files, and doesn't allow the owner access until they've made a payment.