We took bus from Hight Street Kensington at 9:40. The ticket is 9gbp in the morning and 7gbp return bus at 17:00.
It was so magnificence inside of castle and we spent about three hours to finish looking around.
admission fee is 16gbp.
If you are residence in the UK you can get one year unlimited ticket for Castle.
the village of Windsor is small but there are enough shops and restaurants to be able to enjoy ourself for one day trip.