Note: This is similar to another question here but I have made a new one for getting solutions for thr curre t Windows version. Also I have tried a lot of troubleshooting steps. So I thought asking a new question will be better. Please don't mark this as duplicate.
So I followed this page recently: A post to remove Cortana completely. It worked but the side effects were pretty bad. The search won't open when clicked and even hard reset isn't fixing it. I have already tried re-registering Cortana with a reboot but it doesn't work.