diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f1c7f6..7ff3f30 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 - Forced source-client installs to use the native pnpm command path during install, build, and inject.
 - Cleared the temporary installer download folder before fetching a fresh installer.
+- Fixed pnpm warnings being treated as installer failures on Windows PowerShell.
+- Fixed the installer UI download path so it avoids stale loose temp scripts.
 
 ## 1.0.5
 
diff --git a/dist/DiscordLyrics-Installer-UI.cs b/dist/DiscordLyrics-Installer-UI.cs
index f5a3029..4e5b595 100644
--- a/dist/DiscordLyrics-Installer-UI.cs
+++ b/dist/DiscordLyrics-Installer-UI.cs
@@ -13,6 +13,7 @@ internal static class Program
     [STAThread]
     private static void Main(string[] args)
     {
+        ServicePointManager.SecurityProtocol |= SecurityProtocolType.Tls12;
         Application.EnableVisualStyles();
         Application.SetCompatibleTextRenderingDefault(false);
         Application.Run(new InstallerForm(args));
@@ -431,7 +432,12 @@ private string GetInstallerPath()
         if (File.Exists(local))
             return local;
 
-        var temp = Path.Combine(Path.GetTempPath(), "DiscordLyrics-Installer.ps1");
+        var cacheDir = Path.Combine(Path.GetTempPath(), "DiscordLyricsInstaller");
+        Directory.CreateDirectory(cacheDir);
+        var temp = Path.Combine(cacheDir, "DiscordLyrics-Installer.ps1");
+        if (File.Exists(temp))
+            File.Delete(temp);
+
         using (var client = new WebClient())
             client.DownloadFile("https://github.com/" + Repo + "/releases/latest/download/DiscordLyrics-Installer.ps1", temp);
 
diff --git a/dist/DiscordLyrics-Installer.exe b/dist/DiscordLyrics-Installer.exe
index 544a238..7ffca44 100644
Binary files a/dist/DiscordLyrics-Installer.exe and b/dist/DiscordLyrics-Installer.exe differ
diff --git a/dist/DiscordLyrics-Installer.ps1 b/dist/DiscordLyrics-Installer.ps1
index 44788b9..478c04d 100644
--- a/dist/DiscordLyrics-Installer.ps1
+++ b/dist/DiscordLyrics-Installer.ps1
@@ -87,13 +87,26 @@ function Invoke-CheckedCommand {
     )
 
     $ResolvedCommand = Resolve-NativeCommand -Command $Command
-    $CommandLine = Join-CommandLine -Command $ResolvedCommand -Arguments $Arguments
-    $Output = & cmd.exe /d /s /c $CommandLine 2>&1
-    $ExitCode = $LASTEXITCODE
-
-    $Text = ($Output | ForEach-Object { "$_" }) -join [Environment]::NewLine
+    $StartInfo = [System.Diagnostics.ProcessStartInfo]::new()
+    $StartInfo.FileName = $ResolvedCommand
+    $StartInfo.Arguments = ($Arguments | ForEach-Object { ConvertTo-CommandArgument $_ }) -join " "
+    $StartInfo.UseShellExecute = $false
+    $StartInfo.RedirectStandardOutput = $true
+    $StartInfo.RedirectStandardError = $true
+    $StartInfo.CreateNoWindow = $true
+
+    $Process = [System.Diagnostics.Process]::new()
+    $Process.StartInfo = $StartInfo
+    [void]$Process.Start()
+    $StdOut = $Process.StandardOutput.ReadToEnd()
+    $StdErr = $Process.StandardError.ReadToEnd()
+    $Process.WaitForExit()
+    $ExitCode = $Process.ExitCode
+    $Process.Dispose()
+
+    $Text = (@($StdOut, $StdErr) | Where-Object { $_ }) -join [Environment]::NewLine
     if ($Text) {
-        Write-Host $Text
+        Write-Host ($Text.TrimEnd())
     }
 
     if ($ExitCode -ne 0) {
diff --git a/dist/DiscordLyrics-release.zip b/dist/DiscordLyrics-release.zip
index 82fae51..093f53a 100644
Binary files a/dist/DiscordLyrics-release.zip and b/dist/DiscordLyrics-release.zip differ
diff --git a/scripts/DiscordLyrics-Installer-UI.cs b/scripts/DiscordLyrics-Installer-UI.cs
index f5a3029..4e5b595 100644
--- a/scripts/DiscordLyrics-Installer-UI.cs
+++ b/scripts/DiscordLyrics-Installer-UI.cs
@@ -13,6 +13,7 @@ internal static class Program
     [STAThread]
     private static void Main(string[] args)
     {
+        ServicePointManager.SecurityProtocol |= SecurityProtocolType.Tls12;
         Application.EnableVisualStyles();
         Application.SetCompatibleTextRenderingDefault(false);
         Application.Run(new InstallerForm(args));
@@ -431,7 +432,12 @@ private string GetInstallerPath()
         if (File.Exists(local))
             return local;
 
-        var temp = Path.Combine(Path.GetTempPath(), "DiscordLyrics-Installer.ps1");
+        var cacheDir = Path.Combine(Path.GetTempPath(), "DiscordLyricsInstaller");
+        Directory.CreateDirectory(cacheDir);
+        var temp = Path.Combine(cacheDir, "DiscordLyrics-Installer.ps1");
+        if (File.Exists(temp))
+            File.Delete(temp);
+
         using (var client = new WebClient())
             client.DownloadFile("https://github.com/" + Repo + "/releases/latest/download/DiscordLyrics-Installer.ps1", temp);
 
diff --git a/scripts/DiscordLyrics-Installer.ps1 b/scripts/DiscordLyrics-Installer.ps1
index 44788b9..478c04d 100644
--- a/scripts/DiscordLyrics-Installer.ps1
+++ b/scripts/DiscordLyrics-Installer.ps1
@@ -87,13 +87,26 @@ function Invoke-CheckedCommand {
     )
 
     $ResolvedCommand = Resolve-NativeCommand -Command $Command
-    $CommandLine = Join-CommandLine -Command $ResolvedCommand -Arguments $Arguments
-    $Output = & cmd.exe /d /s /c $CommandLine 2>&1
-    $ExitCode = $LASTEXITCODE
-
-    $Text = ($Output | ForEach-Object { "$_" }) -join [Environment]::NewLine
+    $StartInfo = [System.Diagnostics.ProcessStartInfo]::new()
+    $StartInfo.FileName = $ResolvedCommand
+    $StartInfo.Arguments = ($Arguments | ForEach-Object { ConvertTo-CommandArgument $_ }) -join " "
+    $StartInfo.UseShellExecute = $false
+    $StartInfo.RedirectStandardOutput = $true
+    $StartInfo.RedirectStandardError = $true
+    $StartInfo.CreateNoWindow = $true
+
+    $Process = [System.Diagnostics.Process]::new()
+    $Process.StartInfo = $StartInfo
+    [void]$Process.Start()
+    $StdOut = $Process.StandardOutput.ReadToEnd()
+    $StdErr = $Process.StandardError.ReadToEnd()
+    $Process.WaitForExit()
+    $ExitCode = $Process.ExitCode
+    $Process.Dispose()
+
+    $Text = (@($StdOut, $StdErr) | Where-Object { $_ }) -join [Environment]::NewLine
     if ($Text) {
-        Write-Host $Text
+        Write-Host ($Text.TrimEnd())
     }
 
     if ($ExitCode -ne 0) {