Enable clean urls for drupal

In your apache config file (httpd.conf) add the following :

LoadModule rewrite_module modules/mod_rewrite.so

<Directory "path_to_your_drupal_dir">
 AllowOverride All
 RewriteEngine on
 RewriteBase /
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteCond %{REQUEST_FILENAME} !-d
 RewriteRule ^(.*)$  index.php?q=$1 [L,QSA]
</Directory>

Test your configuration by accessing your_host/user/login (instead of ?q=user/login).