A problem in Chillkey

Hi Friends and Assalam o Alaikum to All of you

I am going to share something which i problematic and that is i think you should have noticed.

A day or two ago, i noticed that when i opened my chillkey account in the google chrome it was working for a few minutes and then suddenly something was downloaded automatically which was blocked by the chrome and was warning me that it can be harmful to you, and do remember that the chillkey page was not there anymore but was closed.

I use opera now for chillkey but last night in opera was also not opening it correctly and fully.

Why does this happen?
Can anyone tell me??