Xampp is a software package which contains the most basic tools for running a local webserver: Apache, MySQL, PHP, Perl. After installation open the Xampp Controldialog and start (at least) Apache and MySQL. After successfull start, you have a local webserver "http://localhost", put your HTML files into c:/xampp/htdocs (assuming that you installed Xampp to C: as suggested), lets say "test.html" and finally you may watch it in your browser via http://localhost/test.html
There is a MySQL Server running as well, the default values are:
Port: 3306 (default)
Password: *empty* (leave it empty)
A Database called "test" is already created, of course you may create your own database.