how can I clean a hdd?

[42 columbia]

I have acer lap top and I got a page that I can't remove. It said call this [mod removed scammer#], but I did not, that is the problem.

 

[rgd1101]

Sound like a malware.
scan and clean with
https://www.malwarebytes.org/
http://www.bleepingcomputer.com/download/adwcleaner/