17.3 UNSPECIFIED ERROR

I got tired of all the notices from Kodi about the hackers being able to get into Jarvis 16.1 so I decided to bite and upgrade to 17.3 Now I have tried installing and EVERY time I download the file from anywhere it does not matter what link i use 17.3 keeps giving me UNSPECIFIED ERROR and will not install. It downloads fine but will not install. I see nothing on the forum talking about this UNSPECIFIED ERROR so I made a new thread. If this has been answered then forgive my ignorance but this is baffling. Kodi is all I use for tv viewing so I do not know or understand why 17.3 will not install. Please help