Question Windows doesn't load up properly after building in a new SSD.

Oct 26, 2021
Hello there,
i bought a Samsung SSD and successfully installed it three Days ago.
Everything went smooth, but my PC ran into a bluescreen like two or three times during this time.

Today my PC froze up instead of bluescreenin' and i had to shut it off.
Afterwards i was able to log into my Windows account as usual, but i was facing only a blackscreen and my mouse cursor.
I waitet around twenty minutes and my desktop eventually loaded up, but nothing else, not even my taskbar.
I can't get passed this Error, i have installed windows on an external harddrive and use it at this moment, but i can't even find my SSD in my file explorer.
Otherwise i would format SSD.

Any suggestions?