New software update interrupted

Hi,

I have been trying to update my Samsung Galaxy S5 Active, but it keeps telling me it is interrupted. Why is this? Nothing should be interrupting it. I have more than 3gb free on the device, and have been able to successfully download the 600mb+ file, but when the phone reboots to begin the update process it fails, stating that the process was interrupted. Please help. I currently have 5.0 installed.