Possible reasons: You installed the wrong edition (Student vs. Professional), the key is for EViews 11, or you are using a key already maxed out on concurrent seats.
EViews (Econometric Views) is one of the leading statistical and econometric software packages used by economists, financial analysts, and policy researchers. While the software is powerful, accessing its full capabilities requires a valid license and proper registration. registration key eviews 10
If the prompt does not appear, go to the top menu and select Help > EViews Registration . Possible reasons: You installed the wrong edition (Student