wp on wamp HTTP 404

Hi!
looking for help,hope you do not mind.
I have a windows7basic 64 bit acer laptop. I am a beginner.
I wanted to develop a website, I read somewhere that wampserver allows website on home computers, I thought that this is offline host.
I downloaded wamp2.5 and installed it. I also down loaded wordpress wp-4.4.2, unzipped and pasted in c:\\wamp\www , I did this offline.
Then I opened wamp menu, phpmyadmin and created a database for wp, this also I diid offline.
I went to wp file opened wp-config-sample ,made required changes and renamed it wp-config.php, this also I did offline.
Then on wamp menu I clicked localhost /mysite/ ,error says you are not connected to network. I had done this offline.
So I opened internet explorer and tried localhost/mysite/, the error says “HTTP 404 “,
Whenever I clicked local host, wamp home page appeared but also at bottom windows ticker asked “by default intr (a) net settings are blocked “
Now as per tutorial, computer should have opened wp install screen or said “wp-config.php not found”
How will this happen?
Is Internet explorer to be kept open all the time?
What about intr(a)net block or unblock ? I have laptop only
where have I gone wrong ?