Help with verizon s5

[Rafael04]

I have the Verizon s5 and I still have the 4.4.2 android version, and I want to update it for a long time and it keeps saying the service is unavaiable beacuse in my country doesnt have the verzion tower to bring updates.... So, I need to update my phone via PC, and I dont know where can I download a verzion version of the latest update and I dont know how to do it , can someone give me a link with the website to download it, and if possible explain to me how can I update my phone via pc? Thanks