Recently I've been getting the popup from an intrusive site "danish method" and it's been pretty annoying. Adblocker didn't stop it from popping up.

How to block sites in Windows:

Right click on Notepad and run as administrator
Navigate to C:\Windows\System32\drivers\etc and choose "all files"

Then select hosts

Should look like this:

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.
# 127.0.0.1       localhost
# ::1             localhost

Add this/these line(s) at the bottom of the file

127.0.0.1 websiteyouwishtoblock.com
127.0.0.1 2ndwebsiteyouwanttoblock.com

Then click SAVE or Ctrl + S

You're welcome!

Another way is to go into your routers setting and block it, but this way it will block those sites on any internet you're on.

Nice one

Looks so simple even I could figure it out.