Create with Code 4.4 For-Loops For Waves: play mode freeze

Hi I am a beginner and started a little while ago using my laptop to learn how to use Unity but today I ran into a problem with this tutorial.

In Create with Code 4.4 For-Loops For Waves After completing video 2, his play mode worked, while mine freezes and my memory use jumps up to about 95%. I suspect my laptop doesn't enough enough grunt to process the loop and instantiate the game objects in random positions.

I will paste the code below (I continued on despite being unable to test) and attach a pic of my specs.

This is the code (please not I changed some variable names to be more intuitive to me:

public class Spawner : MonoBehaviour { public GameObject prefabSlot; public GameObject pUpPrefab;

 private float spawnRange = 8.0f;
 public int enemyCount;
 public int waveNumber = 1;

 void Start()
 {
     SpawnWave(waveNumber);
     Instantiate(pUpPrefab, GenerateSpawnPos(), Quaternion.identity);
 }

 void Update()
 {
     enemyCount = FindObjectsOfType<Enemy>().Length;

     if (enemyCount == 0)
     {
         waveNumber++;
         SpawnWave(waveNumber);
         Instantiate(pUpPrefab, GenerateSpawnPos(), Quaternion.identity);
     }
 }

 void SpawnWave(int enemyPopulation)
 {
  
     for (int i = 0; i < enemyPopulation; i = i++)
     {
     Instantiate(prefabSlot, GenerateSpawnPos(), prefabSlot.transform.rotation);
     }
 }

 private Vector3 GenerateSpawnPos()
 {
     float spawnPosX = Random.Range(-spawnRange, spawnRange);
     float spawnPosZ = Random.Range(-spawnRange, spawnRange);
     float dropHeight = 0.0f;

     Vector3 randomPos = new Vector3(spawnPosX, 0, spawnPosZ);

     return randomPos;
 }

}