If you have been looking for a way to control the weeds in your pavers, one solution that works is spraying a weed stop product for lawns directly onto your pavers.  Apply it heavily and let it soak into the cracks between your pavers.  I personally try and use an entire bottle per application, making sure the excess fluid settles between the pavers.  This helps kill any weeds that are currently there within a week or two as well as works to prevent future growth for a few months.  Doing this quarterly will help keep the weeds in your pavers under control.

This product can be found at most local retailers such as Home Depot, Lowes, Walmart, etc. or online at Amazon.com.