Microsoft

Is Your Machine Infected?

How do you know if your computer is infected with some sort of malware?

Let’s start with virus infections. In general, whenever your computer starts acting different from normal, it’s possible that a virus has infected your system. For example, you might see strange messages or graphics displayed on your computer screen or find that normally well-behaved programs are acting erratically. You might discover that certain files have gone missing from your hard disk or that your system is acting sluggish—or failing to start at all. You might even find that your friends are receiving emails from you that you never sent, or that you’re getting returned emails from people you’ve never heard of (a sure sign that your ...