Picture this: you start your computer and wait. And wait. And wait some more. When your desktop finally shows its face, things don’t get any better. Your Internet is sluggish, your programs are taking forever to load, and your cursor is dragging 20 seconds behind your mouse. You might have tried to open too many programs at once. Or. . .
You might be infected.
Sometimes a malware infection is plain as day. Other times it’s a silent killer. If you want to know whether or not your machine is sick, you first need to understand the symptoms. So let’s take a look at the telltale signs.
Blatant Signs of Infection
You’ve Got Ransomware
This one’s the most obvious. Ransomware authors want to make it perfectly clear that you have a malware infection—that’s how they make their money. If you’ve got ransomware, you’ll get a pop-up that tells you your files have been encrypted and there’s a deadline to pay a ransom in order to get them back.
from Brent Lecompte Blog http://brentlecompte.blogspot.com/2016/07/how-to-tell-if-youre-infected-with.html