Turning head its very shaky/Wont update firmware

Any way to fix a headset that wont update? Example when it prompt theres an update and ive clicked update says its going to begin or what not but then it dissapears and closes and doesnt update, no error code nothing.

Ive reinistalled SteamVR - Turned to SteamVR Beta and nothing
Admin mode nothing
Steam support. - they just sent me here, claiming they sent me a replacment dud.
IVe done alot other things and can't get it to work or update

Just for some more details on the jitter, (witch is maybe fixed by the update that i cannot update) When you put the headset on, and move your head to look around the screen is shaking like the SteamVR home page is undergoing a earthquake but outside of vr if your looking at the desktop screen, it looks super smooth