my current problem is that just overnight, without doing anything special or changing or experimenting stuff, I could not access my Internet through windows.
At first, I thought like normal that my internet was gone and just needed to replug/restart the router or wait it out but after waiting I noticed I still received Telegram messages and I could also connect to servers with Teamspeak but my Browser, Email, Discord and Steam did not get any Internet access. Windows said I had no connection, but sometimes it also said I had a connection (in terms of that icon).
So after struggling, I switched to Linux to see if it's just my some weird Server connection problem - I had no problems on Linux, everything was stable.
Alas, Windows still did not work overnight like when the problem just appeared.