diff --git a/doc/install_windows_manually.txt b/doc/install_windows_manually.txt
index 2f1ae22bcb..69d207c871 100644
--- a/doc/install_windows_manually.txt
+++ b/doc/install_windows_manually.txt
@@ -26,15 +26,12 @@ environment by executing the following steps:
     (It is also recommended that the FIREBIRD env var also be used in
     the PATH env var, rather than hard-coding a path.)
 
-  - change the current directory to <root>\bin (here and below
-    <root> is the directory where v2.1 files are located)
+  - change the current directory to where v4.0 files are located
 
-  - Execute either install_super.bat or install_classic.bat depending
-    on architecture required.
+  - Execute install_service.bat
 
-  - optionally, you can copy both fbclient.dll and gds32.dll
-    to the OS system directory. To do so, use the provided instclient.exe
-    tool.
+  - optionally, you can copy fbclient.dll to the OS system directory. 
+    To do so, use the provided instclient.exe tool.
 
 
 Execution as an application
@@ -52,18 +49,18 @@ Firebird is run as application by executing it with the -a switch:
 Installation with a different service name
 ------------------------------------------
 
-A new feature of Firebird 2.1 is the option to run multiple Firebird services
+A feature of Firebird 4.0 is the option to run multiple Firebird services
 simultaneously. To do this you need to make appropriate changes to the
 firebird.conf file and then run instsvc with the -name option. For example:
 
   instsvc install -auto -superserver -guardian -name secondservice
   instsvc start -name secondservice
 
-The install_super.bat and install_classic.bat will do this automatically for
+The install_service.bat will do this automatically for
 you. After modifying the firebird.conf file just pass the servicename as a
 parameter:
 
-  install_super.bat secondservice
+  install_service.bat secondservice
 
 NOTE: If you are running multiple Firebird services it is essential that you 
 do not configure the FIREBIRD environment variable at the system level.
@@ -107,7 +104,7 @@ The initialization can also be scripted using the file input option of isql with
 Uninstallation
 --------------
 
-  - To remove FB 2.1 you should run the uninstall.bat.
+  - To remove FB 4.0 you should run the uninstall_service.bat.
 
   - Pass the service name as a parameter if you have installed Firebird to
     use a different service name.
@@ -117,7 +114,4 @@ Uninstallation
       instclient.exe remove <libname>
 
   - Delete installation directory. You may wish to keep the log file, security
-    database, firebird.conf and databases.conf.
-
-
-
+    database, firebird.conf and databases.conf.
\ No newline at end of file