[Q] Can't upgrade S5 to lollipop topic

Hi guys,

I'm having an issue upgrading my S5 to lollipop. After I download the update, I hit install now and then the phone reboots.. then it immediately boots back up and gives me an error saying there was an error installing the update. I was previously rooted and I unrooted with SuperSu.

Is there an easy way around this or should I just upgrade through odin or something? If this is the case can someone quickly link me to a tutorial to do this? I'm a little rusty.

Thanks,