[Plugin: WooCommerce – excelling eCommerce] Can i unset available widgets?

Try putting this in your theme’s functions.php file:

function my_unregister_widgets() {
	unregister_widget('WooCommerce_Widget_Recent_Products');
	unregister_widget('WooCommerce_Widget_Featured_Products');
	unregister_widget('WooCommerce_Widget_Product_Categories');
	unregister_widget('WooCommerce_Widget_Product_Tag_Cloud');
	unregister_widget('WooCommerce_Widget_Cart');
	unregister_widget('WooCommerce_Widget_Layered_Nav');
	unregister_widget('WooCommerce_Widget_Price_Filter');
	unregister_widget('WooCommerce_Widget_Product_Search');
	unregister_widget('WooCommerce_Widget_Top_Rated_Products');
	unregister_widget('WooCommerce_Widget_Recent_Reviews');
	unregister_widget('WooCommerce_Widget_Recently_Viewed');
	unregister_widget('WooCommerce_Widget_Best_Sellers');
	unregister_widget('WooCommerce_Widget_On_Sale');
	unregister_widget('WooCommerce_Widget_Login');
	unregister_widget('WooCommerce_Widget_Random_Products');
}
add_action('widgets_init', 'my_unregister_widgets');