Hello, Matas Urba
Welcome to the Microsoft Community.
Hello, thank you for your feedback here on your issue, it seems that you are still appearing in Task Manager after disabling News and Interests.
First of all, thank you for sharing the information, if it's convenient for you, you can share your registry disabling method here and I can test it for you if I can reproduce your issue.
Also you can try some of the steps below first to see exactly what happens:
1. First of all, you can use sfc to fix some problems that may cause some system abnormalities by modifying the registry.
Open Command Prompt as administrator (Win + X, then select Command Prompt (Administrator)).
Type sfc /scannow and press Enter.
Allow the scan to complete and follow the instructions provided.
Disclaimer: Running Microsoft Safety Scanner can help you check if the system is disturbed or malicious software exists. To avoid any trouble for you, please back up all your personal files first to ensure you do not lose data.
2. Using PowerShell to Identify Processes
You can use PowerShell to get more information about processes:
Open PowerShell as an administrator.
Run the command:
Get-Process | Where-Object { $_.Name -like “*news*” }
This may help you to identify processes or applications related to “News and Interests”.
3. Create a new user profile
Creating a new user profile can help determine if the issue is specific to the current user profile:
Go to Settings > Accounts > Family and Other Users.
Click Add others to this PC and follow the instructions to create a new user account.
Log in to the new account to see if the problem still exists.
You can also refer to the thread below to create a new account for testing:Manage user accounts in Windows - Microsoft Support
You can try it out by referring to the steps above, and after that, give some feedback and I will further support you.
Best regards
Bobhe | Microsoft Community Support Specialist