What is activation?
Activation helps verify that your copy of Microsoft Expression Blend is genuine, and that it has not been used on more computers than the Microsoft Software License Terms allow. In this way, activation helps prevent software counterfeiting. Activation of Expression Blend is required.
The information collected during activation will not be used to contact you.
Setup will automatically attempt to activate Expression Blend during installation. If automatic activation fails, or if you choose not to activate Expression Blend during installation, you will have 60 days after installing Expression Blend to activate it online or by phone.