Hi Dear,
My name is R. Cord and I will try to help with first tips:
you already provide a lot of steps and it cant solved.
What I can suggest?
Check your third-party antivirus software:
If you have a third-party antivirus program installed, make sure that it is not blocking downloads. You can try temporarily disabling the antivirus software and see if you can download files after that.
Run the Windows Update troubleshooter:
The Windows Update troubleshooter can help identify and fix issues related to Windows updates. To run the troubleshooter, go to Settings > Update & Security > Troubleshoot, and select "Windows Update" under "Get up and running."
Clear your DNS cache:
Sometimes, your DNS cache can become corrupted and prevent you from accessing certain websites or downloading files. To clear your DNS cache, open the Command Prompt as an administrator and type the following command: "ipconfig /flushdns" (without quotes).
Reset your browser settings:
If the issue is specific to your browser, you can try resetting your browser settings to default. In Chrome, go to Settings > Reset and clean up > Restore settings to their original defaults.
Check your download location:
Make sure that your download location is set to a valid folder or directory. In Chrome, go to Settings > Downloads > Location, and make sure that you have selected a valid download location.
Check your user account settings:
Make sure that your user account has the necessary permissions to download files. Go to Settings > Accounts > Family & other users, and check the account permissions for your user account.
Hopefully, one of these steps will help resolve the issue with downloads being blocked on your computer.
I hope I could have helped you!
Regards
R. Cord