Strange window during surfing the Internet

I am using ESET Smart Security and Internet Explorer 7. Today I was searching ESET Knowledgebase in the website http://www.eset.com/support/kb.php. In an article I would like to vote and I clicked Yes at the bottom of the screen. Then a strange window appeared. I think that I have been infected with a virus that Nod32 misses. You can see the window in the attachment. What should I do?

Thank you in advance

 

I'm getting the same error without using a Eset product

 

I wonder if it's a buggered windows update or some kind of infection.

 

Hello,

Thank you for your report. The issue is now resolved.

Regards,

Aryeh Goretsky

 

The problem was solved Was it a bug in the ESET website?

 

I don't understand if it was an ESET bug and it affected someone without ESET, um... anyway At least all is fixed.