Q:

Disable product url without category path (SEO)

When I set the option Use Categories Path for Product URLs to Yes, the product-URL changes to the one with categories path. Thats what I need.
But in that case the product is also availible trough domain.com/producturl.
How can I disable that?
This so that a product only got 1 URL, the URL with categories path.

A:

Set Category Path Yes / No which you want. then go to Database and open the table core_url_rewrite. delete the product url OR Run this query ( DELETE FROM core_url_rewrite WHERE id_path like %product/% ). Login to Admin Panel of your store and Re-index for Products.
Set the Redirection for old url which are index by google. 

