Please take a free trial of the keylogger before you buy it. We issue refunds in 30 days when the software is NOT WORKING on your computer since you purchase it. But No refunds will be guaranteed or promised if you simply changed your mind. As once we issue a registered copy there is no way for us to recall, or rescind a registered program that has already been issued to a customer. Essentially, once the program has been issued there is no way for us to guarantee that a customer has not, or is not continuing to use the product. Thanks for choosing Aobo Software.