سوال: عدم دسترسی به قسمت های مدیریتی رجیستری در C#؟

RegistryKey ourkey = Registry.LocalMachine;
ourkey = ourkey.OpenSubKey(@"SOFTWAREPoliciesMicrosoftWi  ndowsSystem", true);
string tmp = (ourkey.GetValue("EnableSmartScreen ")).ToString();
if (tmp == "0")
{
lblevel.Text = (Int32.Parse(lblevel.Text) - 1).ToString();
ListViewItem lvi = new ListViewItem("3");
lvi.SubItems.Add("normal");
lvi.SubItems.Add("Windows smart screen is Disabled");
listView1.Items.Add(lvi);
}
else if (tmp == "1")
{
lblevel.Text = (Int32.Parse(lblevel.Text) + 1).ToString();
ListViewItem lvi = new ListViewItem("3");
lvi.SubItems.Add("normal");
lvi.SubItems.Add("Windows smart screen is Disabled is Enabled To give user a waing before ruing downloaded unknown software");
listView1.Items.Add(lvi);
}
else
{
lblevel.Text = (Int32.Parse(lblevel.Text) + 2).ToString();
ListViewItem lvi = new ListViewItem("3");
lvi.SubItems.Add("normal");
lvi.SubItems.Add("Windows smart screen is Enabled To give user a waing before ruing downloaded unknown software");
listView1.Items.Add(lvi);