Laptop beeps long?

My laptop has just beeped very loudly for 5 seconds (after I "clicked away" an advertisement) and only stopped when I closed it. Shocked him down first now.

Does anyone have any idea what or why that happened?

Websites. If it happened to me, I was redirected to a website and there was a very loud beep, so I was scared. Simply close all tabs.

When you clicked away something was triggered that wanted to scare you.

It is a virus. I already had that. Always comes as soon as you open the Internet browser. Do a complete scan with the virus scanner. If that doesn't help then you have to reinstall Windows.