Крестики-нолики - Зацикливается программа - Visual Basic .NET

Public Class Form3
    Private intzet As Integer = 0
    Private Sub Button10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button10.Click
        Button1.Text = ""
        Button1.Enabled = True
        Button2.Text = ""
        Button2.Enabled = True
        Button3.Text = ""
        Button3.Enabled = True
        Button4.Text = ""
        Button4.Enabled = True
        Button5.Text = ""
        Button5.Enabled = True
        Button6.Text = ""
        Button6.Enabled = True
        Button7.Text = ""
        Button7.Enabled = True
        Button8.Text = ""
        Button8.Enabled = True
        Button9.Text = ""
        Button9.Enabled = True
 
        intzet = 0
    End Sub
 
    Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Button1.Text = ""
        Button1.Enabled = True
        Button2.Text = ""
        Button2.Enabled = True
        Button3.Text = ""
        Button3.Enabled = True
        Button4.Text = ""
        Button4.Enabled = True
        Button5.Text = ""
        Button5.Enabled = True
        Button6.Text = ""
        Button6.Enabled = True
        Button7.Text = ""
        Button7.Enabled = True
        Button8.Text = ""
        Button8.Enabled = True
        Button9.Text = ""
        Button9.Enabled = True
 
        intzet = 0
    End Sub
    Sub computerplays()
        Dim objRandom As New Random
        Dim intRandom As Integer

        intRandom = Integer.Parse(objRandom.Next(1, 9))

        If intRandom = 1 And Button1.Enabled = True Then
            Button1.Text = "0"
            Button1.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(2, 9))
        End If
 
        If intRandom = 2 And Button2.Enabled = True Then
            Button2.Text = "0"
            Button2.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(3, 9))
 
        End If
 
        If intRandom = 3 And Button3.Enabled = True Then
            Button3.Text = "0"
            Button3.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(4, 9))
 
        End If
 
        If intRandom = 4 And Button4.Enabled = True Then
            Button4.Text = "0"
            Button4.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(5, 9))
 
        End If
 
        If intRandom = 5 And Button5.Enabled = True Then
            Button5.Text = "0"
            Button5.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(6, 9))
 
        End If
 
        If intRandom = 6 And Button6.Enabled = True Then
            Button6.Text = "0"
            Button6.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(7, 9))
 
        End If
 
        If intRandom = 7 And Button7.Enabled = True Then
            Button7.Text = "0"
            Button7.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(8, 9))
 
        End If
 
        If intRandom = 8 And Button8.Enabled = True Then
            Button8.Text = "0"
            Button8.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(1, 7))
 
        End If
 
        If intRandom = 9 And Button9.Enabled = True Then
            Button9.Text = "0"
            Button9.Enabled = False
 
            Exit Sub
        Else
            intRandom = Integer.Parse(objRandom.Next(1, 8))
 
        End If

        computerplays()
 
    End Sub
 
    Private Sub Youplays(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click, Button2.Click, Button3.Click, Button3.Click, Button4.Click, Button5.Click, Button6.Click, Button7.Click, Button8.Click, Button9.Click
 
        sender.text = "X"
        sender.enabled = False
        intzet = 1
        CheckWinner()
        computerplays()
        intzet = 1
 
    End Sub
 
    Sub CheckWinner()
        If intzet >= 5 Then
            If MessageBox.Show("Ничья!") = vbOK Then
                Me.Close()
 
                Form1.Show()
            End If
 
        ElseIf Button1.Text = "O" And Button2.Text = "O" And Button3.Text = "O" _
            Or Button4.Text = "O" And Button5.Text = "O" And Button6.Text = "O" _
            Or Button7.Text = "O" And Button8.Text = "O" And Button9.Text = "O" _
            Or Button1.Text = "O" And Button4.Text = "O" And Button7.Text = "O" _
            Or Button2.Text = "O" And Button5.Text = "O" And Button8.Text = "O" _
            Or Button3.Text = "O" And Button6.Text = "O" And Button9.Text = "O" _
            Or Button1.Text = "O" And Button5.Text = "O" And Button9.Text = "O" _
            Or Button7.Text = "O" And Button5.Text = "O" And Button3.Text = "O" Then
            If MessageBox.Show("Компьютер победил") = vbOK Then
                Me.Close()
 
                Form1.Show()
            End If
 
        ElseIf Button1.Text = "X" And Button2.Text = "X" And Button3.Text = "X" _
        Or Button4.Text = "X" And Button5.Text = "X" And Button6.Text = "X" _
        Or Button7.Text = "X" And Button8.Text = "X" And Button9.Text = "X" _
        Or Button1.Text = "X" And Button4.Text = "X" And Button7.Text = "X" _
        Or Button2.Text = "X" And Button5.Text = "X" And Button8.Text = "X" _
        Or Button3.Text = "X" And Button6.Text = "X" And Button9.Text = "X" _
        Or Button1.Text = "X" And Button5.Text = "X" And Button9.Text = "X" _
        Or Button7.Text = "X" And Button5.Text = "X" And Button3.Text = "X" Then
            If MessageBox.Show("игрок победил") = vbOK Then
                Me.Close()
 
                Form1.Show()
 
            End If
        End If
    End Sub
End Class