I checked the read only boxes, there are no checkmarks. Ok, good.

Then when I open the HOST file (with the 1KB), with the notepad app, there are long strings of numbers at the bottom

(copy of bottom)

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

127.0.0.1 localhost

Am I supposed to be changing some of these numbers???