Hey!
I had the same issue and literally nothing worked. I did everything and more.
Then I noticed that my Bitdefender wasnt working properly either, so I looked it up and I was informed to download English (US) language pack from Windows language settings and add it as the preferred language. Then I restarted my pc and Bitdefender worked.
THEN I had the idea to try install Nvidia latest driver one last time and it amazingly worked. After trying every single tip on internet, downloading English (US) language pack and setting it as default did the trick.
Curious to know if this works for anyone else.