From 404bf06e90c8f60025e834675e1662cf1036775f Mon Sep 17 00:00:00 2001
From: tigros <straightupandup@yahoo.com>
Date: Wed, 27 Dec 2023 02:12:07 -0500
Subject: [PATCH] fix for #40

---
 whisperer/Form1.cs | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/whisperer/Form1.cs b/whisperer/Form1.cs
index bf79c31..c08bc88 100644
--- a/whisperer/Form1.cs
+++ b/whisperer/Form1.cs
@@ -59,6 +59,14 @@ public bool PreFilterMessage(ref Message m)
 
         void Form1_Load(object sender, EventArgs e)
         {
+            if (!IsAtLeastWindows10())
+            {
+                ShowError(@"Unsupported Windows version, will now exit.");
+                FormClosing -= new FormClosingEventHandler(Form1_FormClosing);
+                Application.Exit();
+                return;
+            }
+
             Thread thr = new Thread(initperfcounter);
             thr.IsBackground = true;
             thr.Start();
@@ -106,6 +114,18 @@ void Form1_Load(object sender, EventArgs e)
                 button3_Click(null, null);
         }
 
+        bool IsAtLeastWindows10()
+        {
+            try
+            {
+                string productName = (string)Registry.GetValue(@"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion", "ProductName", "");
+                return productName.Contains("Windows 1") || productName.Contains("Windows 2") || productName.Contains("Windows 3"); 
+            }
+            catch { }
+
+            return false;
+        }
+
         void loadfilelist()
         {
             string s = readreg("files", "");
@@ -207,10 +227,7 @@ void initperfcounter()
             }
             catch (Exception ex)
             {
-                if (ex.HResult == -2146233079)
-                    ShowError(@"Unsupported Windows version, will now exit.");
-                else
-                    ShowError(@"Possibly corrupt perf counters, try C:\Windows\SysWOW64\LODCTR /R from admin cmd prompt, will now exit.");
+                ShowError(@"Possibly corrupt perf counters, try C:\Windows\SysWOW64\LODCTR /R from elevated cmd prompt, if an error occurs, run it again. Will now exit.");
                 FormClosing -= new FormClosingEventHandler(Form1_FormClosing);
                 Application.Exit();
             }