If these manipulations did not have an effect, you should perform the following actions:
1. Press Windows + R on your keyboard. When the Run window opens, type in the following command: "%systemroot%\system32\drivers\etc\hosts." and press OK or Enter.
2. Windows will display a prompt asking you what program should be used to open the file. Select Notepad and press OK;
3. Check for any records containing "adguard.com". They should look like this: