Problem to log in WordPress

Hello,

I am a newbie in the world of WordPress, Localhost and
‘make-a-website-by-yourself’.
It took six hours yesterday (including breaks) 😉
to install XAMPP, WAMP and WordPress.
Had some problem Apache and MySQL; but by
research I solved this problems.

Yesterday evening I start to practice make a website
by a movie from YouTube. Everything was fine (and easy!).
This morning I woke up and can’t log in in WordPress.

These are the results:
http://localhost/wordpress/admin = The requested URL /wordpress/admin was not found on this server.
http://localhost/wordpress/wp-admin/ = The requested URL /wordpress/admin was not found on this server.
http://localhost/wp-login.php = The requested URL /wp-login.php was not found on this server.

What is wrong or what do I wrong?

Here is more information:
XAMP = is working (Apache & MySQL)
WAMP = is green and is online
Localhost = is working
localhost/phpmyadmin = working
Skype/Virusscanner = are off

Question:
How get I the screen to log in to mine WordPress, like as I did yesterday?
I created my own username and password yesterday, I still remember
this information.

I checked google and this forum; no information was able
to solve this problem.

Hopefully somebody can help this newbie. 🙂