diff --git a/windowinstallersrc/installer.md b/windowinstallersrc/installer.md
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+++ b/windowinstallersrc/installer.md
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+The window installer script is written in Pascal and it can be compiled with open source setup compiler called [INNO] (http://www.jrsoftware.org/) Setup compiler. 
\ No newline at end of file
diff --git a/windowinstallersrc/setup.iss b/windowinstallersrc/setup.iss
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+; Script generated by the Inno Setup Script Wizard.
+; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!
+
+#define MyAppName "Bitmessage"
+#define MyAppVersion "0.4.1"
+#define MyAppPublisher "Bitmessage"
+#define MyAppURL "https://bitmessage.org/"
+#define MyAppExeName "BitUpdate.exe"
+
+[Setup]
+; NOTE: The value of AppId uniquely identifies this application.
+; Do not use the same AppId value in installers for other applications.
+; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
+AppId={{07D13D6F-16AA-47D2-B06C-09CED5C2BFFB}
+AppName={#MyAppName}
+AppVersion={#MyAppVersion}
+;AppVerName={#MyAppName} {#MyAppVersion}
+AppPublisher={#MyAppPublisher}
+AppPublisherURL={#MyAppURL}
+AppSupportURL={#MyAppURL}
+AppUpdatesURL={#MyAppURL}
+DefaultDirName={pf}\{#MyAppName}
+DefaultGroupName={#MyAppName}
+OutputDir=C:\Users\pbudhathoki\Desktop\Software engineering
+OutputBaseFilename=Setup
+Compression=lzma
+SolidCompression=yes
+
+[Languages]
+Name: "english"; MessagesFile: "compiler:Default.isl"
+
+[Tasks]
+Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked
+Name: "startup"; Description: "Start BitMessage at User Login";  Flags: unchecked
+Name: "quicklaunchicon"; Description: "{cm:CreateQuickLaunchIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked; OnlyBelowVersion: 0,6.1
+
+[Files]
+Source: "C:\Users\pbudhathoki\Desktop\Window Installer with Autoupdate\BitUpdate.exe"; DestDir: "{app}"; Flags: ignoreversion
+; NOTE: Don't use "Flags: ignoreversion" on any shared system files
+
+[Icons]
+Name: "{group}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"
+Name: "{userstartup}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}" ;  Tasks: startup
+Name: "{group}\{cm:UninstallProgram,{#MyAppName}}"; Filename: "{uninstallexe}"
+Name: "{commondesktop}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon
+Name: "{userappdata}\Microsoft\Internet Explorer\Quick Launch\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: quicklaunchicon
+
+[Run]
+Filename: "{app}\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#StringChange(MyAppName, '&', '&&')}}"; Flags: nowait postinstall skipifsilent
+