Threat bloced for dudujutu.com

Please can someone tell me what is dudujutu.com, as AVQ keeps telling me threat blocked. They have aborted connection because it was infected with URL:Blacklist. This happened various times when I'm conected to the internet, what can I do?

Thank you for providing the screenshot, Michele.
We'll certainly check and help you. Do not worry. 
Please follow the below article and reset your default browser, relaunch the browser and check if it helps.
(https://support.avg.com/SupportArticleView?l=en&urlName=avg-reset-browser&q=browser+reset&supportType=home)
Thank you and keep us updated.

This is what appears and I don't know how to get rid of it, or why it keeps appearing. Who's trying to access my computer?  they're very persistent.

Many thanks

User-added image

This is what appears and I don't know how to get rid of it, or why it keeps appearing. Who's trying to access my computer?  they're very persistent.

Many thanks

User-added image