What can I do?
The system crashed when I was surfing on the internet.
Did you go to any illegal website?
No, But does that matter?
Yes, your computer can be easily infected by virus if you do that.
I see. I'd better never try.
That's wise.
Do you know what's wrong with my PC?
One minute. Oh, yes, it was infected by a virus, and you had no antivirus software.
Is anti-virus software necessary for a PC?
Of course. You'd better learn something about it.
I'm afraid yes. But what about the data I stored in the computer?
Don't worry, it should have been protected automatically. And I take an anti-virus software with me. Do you want me to install it now?
Yes, please. I'll really appreciate that.