It happened many times to me and every time I lose some unsaved work.

Some times I open a website that it will automatically takes me to a spam site that shows a message box that says 

> 
> Warning : Zeus Virus Detected
> 
> 
> 

When I try to close the error message and close that tab, it does not let me do that.

Every time I click on OK button the same message appear again.

How can I close this spam only without closing all other tabs.

I am using Chrome.