This is the weirdest problem that I have ever faced. I have a MacBook Pro 15 2017 (MPTR2LL/A ?, running on MacOS 10.14.1), and I recently installed Windows using Bootcamp (dual boot) and then installed Parallels 14. This is what is happening:
Before I installed Windows, everything was perfect. Then I install Windows using Bootcamp (new partition and all). During the installation process, I notice that Windows was unable to connect to the internet, and hence I was unable to log in using my Microsoft account. I let it go, I figured some drivers might be missing, and I just finished the install.
After the installation, I boot up the Windows partition, everything works perfectly, the resolution is set automatically, and I was like great, this should work now. But nope, I connect it to my dorm room router, and it doesn't connect to the internet. It actually kills my router for 15 minutes (my university has a weird internet policy, they kill your line for 15 minutes if they detect any incorrectly configured router).
As this didn't work out, on the suggestion of my friend, I install Parallels 14 and boot up the Windows partition. The situation is still the same, it doesn't connect to the internet and kills my connection.
After my connection is restored, I try googling for a fix, but I notice that the internet doesn't work on the MacOS either. So I go to the best solution known to man: "try turning it off and on". I restart it, and the internet works on the MacOS. I boot up Windows again using Parallels and the internet stops working on both operating systems.
So I thought maybe it's my router (pretty irrational, since the internet doesn't work on MacOS either). So I go to the library and connect to the university wifi and try the same thing, but the situation is still the same.
So now, I've officially given up. I am pretty sure it is some checkbox that I ticked, or didn't tick, but I cannot solve this on my own. Has someone ever experienced this before, or can suggest something that I can try?