diff --git a/lib/train/extras/windows_file.rb b/lib/train/extras/windows_file.rb
index 0236becf..8d5283af 100644
--- a/lib/train/extras/windows_file.rb
+++ b/lib/train/extras/windows_file.rb
@@ -26,7 +26,9 @@ def content
     end
 
     def exist?
-      nil
+      return @exist if defined?(@exist)
+      @exist = @backend.run_command(
+        "(Test-Path -Path \"#{@spath}\").ToString()").stdout.chomp == 'True'
     end
 
     def link_target