diff --git a/ConfigWinRMForZabbix/Download-WinRMConfigScript.ps1 b/ConfigWinRMForZabbix/Download-WinRMConfigScript.ps1
index bde669e..0f5febd 100644
--- a/ConfigWinRMForZabbix/Download-WinRMConfigScript.ps1
+++ b/ConfigWinRMForZabbix/Download-WinRMConfigScript.ps1
@@ -36,11 +36,13 @@
 .NOTES
     Author:   Petr Štěpán
     Created:  2026-07-21
-    Version:  1.1.0
+    Version:  1.2.0
     Changelog:
         1.0.0 - Initial version
         1.1.0 - Added $env:ZabbixProxyIPAddress fallback so a plain "irm | iex"
                 one-liner can supply the IP address without "& { ... } -Param" wrapping
+        1.2.0 - Only call exit when running as a real .ps1 file, not when run via
+                "irm | iex" - exit would otherwise close the caller's PowerShell window
 #>
 
 [CmdletBinding()]
@@ -181,7 +183,16 @@ try {
 }
 catch {
     Write-Error "Script failed: $_"
-    exit 1
+    # $MyInvocation.MyCommand.Path is only set when this runs as an actual .ps1 file.
+    # When run via "irm <url> | iex" there is no backing file - the code executes in
+    # the caller's own session, so calling exit here would close their whole
+    # PowerShell window instead of just ending this script.
+    if ($MyInvocation.MyCommand.Path) {
+        exit 1
+    }
+    return
 }
 
-exit 0
+if ($MyInvocation.MyCommand.Path) {
+    exit 0
+}