Editor Not Opening

Hi,

Just got a new windows 10 machine and downloaded Unity. I can get as far as creating a new project but when I try open it, nothing pops up on screen. In the task managers background processes I can see Unity and two Unity helper tasks have popped up. I need to end them to be able to open unity again which only gets me as far as opening the project again where the editor doesn't start.
Have reinstalled twice and restarted my computer. It opened my project once with this error:
Error loading launcher://unity/C:/Users/User/AppData/Roaming/Unity/Packages/node_modules/unity-editor-home/dist/index.html?code=xKXeh9TgEkUpxb9xRnboiQ01af&locale=en&session_state=bdbea9187964778884d5563621c8dd37e1ff1cc5cbcb18998277af9fbad8bff2.GYr3D0Fw0k_ffZ6irWujZg005f#/login

I've started unity with anti virus and firewall turned off, checked my username has no spaces, downloaded an older version of unity but nothing works.

Thanks,
Jack

 

Bump.