My Unity Editor opens but the window stays grey. Help -.-

I had to reset my Notebook, now unity seems to have some Problems. i have installed Unity Editor 5.4.2 32 Bit
Yes i have 32 bit System…
And if i open Unity the window appears where you actually have to sign in or create/load a Project but it stays Grey?

Possible solution:

https://forum.unity3d.com/threads/unity3d-5-3-not-working.372682/#post-2415582