I run everything up to date EVERY session.
Picked up a ransomware virus from clicking on facebook baby pictures.
It locks the computer. demands $$ and almost no way to get around it.
Great scam, freakin' geniuses that could cure cancer by noon if
they used their talents for good and not evil.
I have NO suggestions on how to prevent.
Microsoft has a downloadable boot disc for security essentials
which works but does NOthin to the virus and can't even find it.