Hi there, How can I fix my Samsung Galaxy S3?

[AC Question]

Hi there, im having a samsung galaxy S3..

Recently im having an error in downloading watsapp and my hubby help to reinstore/reprogram.

Now when i switch on my phone, its hanging there showing samsung on the secreen. I cant do anything but take out the battery. Its still hanging. Plz advise.

Is there anything tht can be solved.

Thanks & Regards,
Wendy