السلام عليكم ورحمة الله وبركاته 

جرب يا قمر 

كود :
Dim toDelete As List(Of DataGridViewRow) = New List(Of DataGridViewRow)()
For Each row As DataGridViewRow In dataGridView1.Rows
If row.Cells(0).Value = True Then
toDelete.Add(row)
End If
Next
For Each row As DataGridViewRow In toDelete
dataGridView1.Rows.Remove(row)
Next