If you have Windows Server 2008 R2 & having problem to start Internet Information Services IIS due to Windows Process Activation Service (WAS) unable to Start or file missing (“file not found”) you want to do the following.
It works for me.
Since version 3.5, WordPress no longer allow user to change media upload folder from admin dashboard. To change user have to edit “wp-config.php” file located in wordpress intallation folder
If you want to change the upload folder like http://www.example.com/wp-content/images/, you have to add the following code in “wp-config.php”
define( 'UPLOADS', 'wp-content/'.'images' );
If you want to change the upload folder like http://www.example.com/images/, you have to add the following code in “wp-config.php”
define( 'UPLOADS', ''.'images' );
You can still choose whether or not you want uploaded files to be organized in month/year folders in Settings » Media.