Malware/Virus constantly slows down and disconnects my internet and redirects to harmful webpages

Hi, I'm bombed by a harmful virus which always slowing down my internet and lots of disconnections. I also redirected to different harmful web pages (some of them are Russian porn sites and dating sites).

I scanned multiple times with Kaspersky Internet Security tools (pro) and Malwarebytes along with Adware Cleaner. They couldn't detect any infections.

Because of this virus I can't use my internet properly. Every other computer and phone at my home can connect to internet with high speed...

Malware/Virus constantly slows down and disconnects my internet and redirects to harmful webpages