Manually install Apache, MySQL, PHP and PHPMyAdmin

Or A noob's guide to pass the Wietingen test.
For Windows, but works for others as well (with a few minor changes, mainly the paths)

Apache

Download
Run and install the Server Only package
Keep all the settings on default and set the root user's password to something you can remember (like: password)

In ./config/httpd.conf

Add LoadModule php5_module php/php5apache2_4.dll
Add AddType application/x-httpd-php .php at the bottom of <IfModule mime_module>
Add PHPIniDir "c:\Apache24\php" to the bottom of the file

Copy php.ini-production and rename to php.ini
Set the doc_root = line to doc_root = c:\apache24\htdocs in the newly created php.ini
Uncomment the ; extension_dir = "ext" line, and change it to extension_dir = "C:\Apache24\php\ext" or wherever you installed PHP, make sure the path is absolute!
Enable extension=php_pdo_mysql.dll, extension=php_mysqli and extension=php_mbstring.dll (by removing the ; at the start of the line)
You should now be able to start the Apache service throught ApacheMonitor

Make a phpinfo.php in your htdocs folder and paste <?php phpinfo() ?> in it
Go to http://localhost/phpinfo.php, there should be a long list with info. If you see just a blank page with the code we pasted in it then your PHP is not working. Read the above stuff again and fix it before continuing past this point

Download
Extract in ./htdocs/phpmyadmin/
In the folder ./htdocs/phpmyadmin/ rename config.sample.inc.php to config.inc.php and change the cfg['blowfish_secret'] = '' to cfg['blowfish_secret'] = 'thisismysecret,thishastobeprettylongsojusttypesomerandomcrap'
Go to http://localhost/phpmyadmin/index.php and log in with your username and password (if you see a white page then something isn't working right. Check your apache2/logs and google the errors you see)

Check the log in C:\Apache24\logs\error.log if something isn't working.