To obtain IObit Driver Booster Pro 9 legally, you should purchase it directly from IObit’s official website or authorized resellers. By doing so, you ensure that you are getting a legitimate copy of the software with all the necessary updates and technical support. IObit often offers various purchasing options, including single-user licenses and multi-user licenses, allowing you to choose the plan that best suits your needs. Additionally, some legitimate software providers offer free trial versions or discounts for new customers.