The Next button cannot be clicked until a user chooses the “I accept the terms of the license agreement” option. I. LICENSE PERIOD The license period begins from the date of purchase of the license and lasts 3 years from the date of purchase. To renew a license after the initial three-year period, the cost is 50% of the full list price of a new license at the time of license renewal; this renewed licence is also valid for an additional three years. The presentation of the EULA from the beginning of the installation gives the user the opportunity to check the conditions of the EULA and decide whether he really wants to continue the installation and what goes with it. Inserting a link to the EULA on the download page can be useful and is a great way to present as much information as possible to your users. However, be sure to include the EULA with a Clickwrap “I Agree” form, after the user physically begins the installation. DTF: Now, the code response. There is a component installed with the WiX toolkit called DTF – Desktop Tools Foundation It has a number of C classes that have been developed for managing MSI files through managed code. This answer explains the file to be added as a reference in Visual Studio and briefly describes the different DTF files/assemblies. Another example of DTF. In Feldman v. Google, a court, decided that by clicking on a box with the inscription “Yes, I agree with the above terms” to continue the next step in the creation of Google AdWords, Feldman expressed his agreement with the agreement, knew the terms properly and intended to be subject to the terms.