Now my problem is as follows:
My windows says there is an active connection.
My internet works fine I replugged the cable to my Laptop and WLan is workin just as good.
I re-installed the drive and the ProSet Adapter Configuration Utility program doesn't find any issues either
When I run windows problem solving it tells me that my dns-server isn't responding (which can't be cause connecting with my laptop is working fine)
Windows 10 64-bit
Intel(R) Core(TM) i7-7700T CPU @ 2.90Ghz
Nvidia GeForce GTX 1080 Ti
If you need more information just tell me.
I don't know how to delete this thread but here is my solve:
Thunderbird (Mailprogramm) was the culprit. It had an update where sending emails got special coding and password options that forced after my pc in some weird limbo where... I don't know: But after de-installation of the programm and rebooting, everything went back to normal.