Update runtime files.
diff --git a/runtime/doc/os_dos.txt b/runtime/doc/os_dos.txt
index bc883c8..925c7e0 100644
--- a/runtime/doc/os_dos.txt
+++ b/runtime/doc/os_dos.txt
@@ -52,12 +52,18 @@
See |$VIM| and |$VIMRUNTIME| for more information.
-Under Windows 95, you can set $VIM in your C:\autoexec.bat file. For
-example: >
- set VIM=D:\vim
-Under Windows NT, you can set environment variables for each user separately
-under "Start/Settings/Control Panel->System", or through the properties in the
-menu of "My Computer", under the Environment Tab.
+You can set environment variables for each user separately through the
+System Properties dialog box. The steps to do that:
+1. Type Windows Key + R to open the "Run" dialog box.
+2. Enter "sysdm.cpl" and press the "OK" button. The "System Properties"
+ dialog box will open.
+3. Select the "Advanced" tab and press the "Environment Variables..." button.
+ The "Environment Variables" dialog box will open.
+4. Select an existing variable in the "User variables" list and press the
+ "Edit..." button to edit it. Or press the "New..." button to add a new
+ variable.
+5. After you finished editing variables, press the "OK" button to save the
+ changes.
==============================================================================
2. Using backslashes *dos-backslash*