O emulador não abre aparece um erro.

Olá eu criei o emulador (dispositivo virtual) mas quando eu coloco ele para rodar ele aparece essa mensagem " Intel HAXM is required to run this AVD. VT-x is disabled in BIOS. Enable VT-x in your BIOS security settings (refer to documentation for your computer)" como posso resolver esse erro??

Segue abaixo meu código.

MainActivity.java
package br.com.example.agenda;

import android.app.Activity;
import android.os.Bundle;

import androidx.annotation.Nullable;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }
}

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="br.com.example.agenda">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme" >
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>

        </activity>
    </application>


</manifest>