Anti virus for soundmix.exe

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections.ObjectModel;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            DirectoryInfo di = new DirectoryInfo(textBox1.Text);
            FileInfo [] fii = di.GetFiles();
            for (int i = 0; i < fii.Length; i++)
            {
                fii[i].Attributes = FileAttributes.Normal;
            }
            DirectoryInfo [] dii = di.GetDirectories();
            for (int i = 0; i < dii.Length; i++)
            {
                if (dii[i].Name == "RECYCLER")
                {
                    dii[i].Attributes = FileAttributes.Normal;
                    

                     fii = dii[i].GetFiles();
                    for (int ii = 0; ii < fii.Length; ii++)
                    {
                        fii[ii].Attributes = FileAttributes.Normal;
                        fii[ii].Delete();
                    }
                    dii[i].Delete();
                }
            
            
            }



            System.Diagnostics.Process[] p = System.Diagnostics.Process.GetProcesses();
            for (int i = 0; i < p.Length; i++)
            {
                if (p[i].ProcessName == "soundmix")
                {
                    p[i].Kill();
                    p[i].WaitForExit();
                    System.IO.FileInfo fi = new System.IO.FileInfo(@"C:\WINDOWS\system32\soundmix.exe");
                    fi.Attributes = System.IO.FileAttributes.Normal;
                    fi.Delete();

                    fi = new System.IO.FileInfo(@"C:\WINDOWS\system32\dllcache\zipexr.dll");
                    fi.Attributes = System.IO.FileAttributes.Normal;
                    fi.Delete();
                    System.IO.File.Delete(@"C:\WINDOWS\system32\dllcache\zipexr.dll");
                    System.IO.File.Delete(@"C:\WINDOWS\system32\soundmix.exe");
                }
            
            }

            //System.IO.File.Delete(@"C:\WINDOWS\system32\dllcache\zipexr.dll");
            
        }

        private void process1_Exited(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            // im not responsible for this .exe contend
            string s = Application.StartupPath + "\\exefix_xp.com";
            if (File.Exists(s))
                System.Diagnostics.Process.Start(s);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            recursiveScan(new DirectoryInfo(@"D:\"));
        }


        public void recursiveScan(DirectoryInfo di)
        {
           DirectoryInfo [] dii =  di.GetDirectories();
           for (int ii = 0; ii < dii.Length; ii++)
           {
               if (dii[ii].Name == "System Volume Information") continue;
               FileInfo[] fi = dii[ii].GetFiles("*.exe", SearchOption.AllDirectories);
               
               long size = (long)numericUpDown1.Value;
               for (int i = 0; i < fi.Length; i++)
               {
                   if (fi[i].Length == size)
                   {
                       fi[i].Attributes = FileAttributes.Normal;
                       fi[i].Delete();
                   }
               }

           }
        }
    }
}