diff --git a/src/define.sh b/src/define.sh
index c9fb844..e798465 100644
--- a/src/define.sh
+++ b/src/define.sh
@@ -75,6 +75,9 @@ parseVersion() {
     "xp64" | "xpx64" | "5x64" | "winxp64" | "winxpx64" | "windowsxp64" | "windowsxpx64" )
       error "Windows XP $msg" && return 1
       ;;
+    "2k" | "2000" | "win2k" | "win2000" | "windows2k" | "windows2000" )
+      error "Windows 2000 $msg" && return 1
+      ;;      
     "25" | "2025" | "win25" | "win2025" | "windows2025" | "windows 2025" )
       error "Windows Server 2025 $msg" && return 1
       ;;