Unity Editor 5.4.2 wont open correctly

Questions & Answers
1

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?

2

Same, but i’ve got 64bit system.
Can’t do nothing, grey window. Imgur: The magic of the Internet

3

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