Unity Error !! Help Me out !!

Hello,
I m a student, yesterday for the first tym i installed unity 5.1.2f1 on my windows 8.1 .
It has installed perfectly but now when i open the app after sign in and after selecting unity personal option when it came to survey page,The page stuck after choosing the country. The page is not going down…the scroll bar is not working ,i have tired plenty of times and when i troubleshoot the app so a problem came with incompability program…now what does i do…plz help me…!!

Did you try a manual activation? Unity - Manual: Manual license activation
Or to bypass the welcome screen: Manual activation Unity 5 - Unity Engine - Unity Discussions