Ransomware is on the rise and you have to be careful. A heatwave caused a power outage at MySpace's host. How serious are phone threats? Security firms can't seem to agree.

"F-Secure is saying there's a huge risk of malcode spreading, but they've built this up," said Simon Perry, the European vice president of security for CA. "If you look at their behavior, they've consistently pushed this message. But it's a theoretical; not a real threat."