diff --git a/install/WizardImage.bmp b/install/WizardImage.bmp
new file mode 100644
index 000000000..ad204ec05
Binary files /dev/null and b/install/WizardImage.bmp differ
diff --git a/install/install.iss b/install/install.iss
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--- /dev/null
+++ b/install/install.iss
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+#include <ISPPBuiltins.iss>
+
+#define MyAppName      "OneScript"
+#define MyAppPublisher "EvilBeaver"
+#define MyAppURL       "https://oscript.io"
+
+#define VerMajor
+#define VerMinor
+#define VerRelease
+#define Build
+
+#define ArtifactRoot "..\built\tmp"
+#define OvmExeSource "ovm.exe"
+
+#define WizardImageSource "WizardImage.bmp"
+#define LicenseSource "..\LICENSE"
+
+
+#ifndef Suffix
+  #define Suffix "x86"
+#endif
+
+#if Suffix == "x64"
+  #define Binaries="bin"
+#else
+  #define Binaries="bin32"
+#endif
+
+#expr GetVersionComponents(ArtifactRoot + "\" + Binaries + "\ScriptEngine.dll", VerMajor, VerMinor, VerRelease, Build)
+
+[Setup]
+AppName                 = {#MyAppName}
+AppVersion              = {#VerMajor}.{#VerMinor}.{#VerRelease}
+AppPublisher            = {#MyAppPublisher}
+AppPublisherURL         = {#MyAppURL}
+AppSupportURL           = {#MyAppURL}
+AppUpdatesURL           = {#MyAppURL}
+DefaultDirName          = {localappdata}\OneScript
+LicenseFile             = {#LicenseSource}
+DisableProgramGroupPage = yes
+OutputBaseFilename      = "OneScript-{#VerMajor}.{#VerMinor}.{#VerRelease}-{#Suffix}"
+Compression             = lzma
+SolidCompression        = yes
+WizardStyle             = modern
+DisableWelcomePage      = no
+WizardImageFile         = {#WizardImageSource}
+PrivilegesRequired      = lowest
+
+#if Suffix == "x64"
+  ArchitecturesInstallIn64BitMode="x64"
+#endif
+
+[Languages]
+Name: "russian"; MessagesFile: "compiler:Languages\Russian.isl"
+
+[Files]
+Source: "{#ArtifactRoot}\*"; DestDir: "{app}\{#VerMajor}.{#VerMinor}.{#VerRelease}"; Flags: recursesubdirs
+Source: "{#OvmExeSource}"; DestDir: "{app}"; DestName: "ovm.exe"; Check: InstallOvmSelected
+
+
+[UninstallDelete]
+Type: filesandordirs; Name: "{app}\{#VerMajor}.{#VerMinor}.{#VerRelease}"
+
+[Code]
+
+var
+  OvmPage: TWizardPage;
+  OvmIntroLabel: TNewStaticText;
+  InstallOvmCheckBox: TNewCheckBox;
+
+procedure InitializeWizard;
+begin
+  OvmPage := CreateCustomPage(wpSelectDir,
+    'Менеджер версий OVM',
+    'Установка менеджера версий OneScript');
+
+  OvmIntroLabel := TNewStaticText.Create(OvmPage);
+  OvmIntroLabel.Parent := OvmPage.Surface;
+  OvmIntroLabel.Left := 0;
+  OvmIntroLabel.Top := 0;
+  OvmIntroLabel.Width := OvmPage.SurfaceWidth;
+  OvmIntroLabel.Height := ScaleY(40);
+  OvmIntroLabel.AutoSize := False;
+  OvmIntroLabel.WordWrap := True;
+  OvmIntroLabel.Caption :=
+    'OneScript Version Manager (OVM) - утилита, предназначенная для установки, обновления и переключения между различными версиями OneScript';
+
+  InstallOvmCheckBox := TNewCheckBox.Create(OvmPage);
+  InstallOvmCheckBox.Parent := OvmPage.Surface;
+  InstallOvmCheckBox.Left := 0;
+  InstallOvmCheckBox.Top := OvmIntroLabel.Top + OvmIntroLabel.Height + ScaleY(14);
+  InstallOvmCheckBox.Width := OvmPage.SurfaceWidth;
+  InstallOvmCheckBox.Caption := 'Установить OVM';
+  InstallOvmCheckBox.Checked := True;
+end;
+
+function InstallOvmSelected(): Boolean;
+begin
+  Result := InstallOvmCheckBox.Checked;
+end;
+
+function RemoveDirectoryLink(const LinkPath: String): Boolean;
+var
+  ResultCode: Integer;
+begin
+  if not DirExists(LinkPath) then
+  begin
+    Result := True;
+    Exit;
+  end;
+  Result := Exec('cmd.exe', '/C rmdir "' + LinkPath + '"',
+    '', SW_HIDE, ewWaitUntilTerminated, ResultCode) and (ResultCode = 0);
+end;
+
+function CreateDirectoryJunction(const LinkPath, TargetPath: String): Boolean;
+var
+  ResultCode: Integer;
+begin
+  if not DirExists(TargetPath) then
+  begin
+    MsgBox('Каталог версии OneScript не найден:' + #13#10 + TargetPath, mbError, MB_OK);
+    Result := False;
+    Exit;
+  end;
+
+  if not RemoveDirectoryLink(LinkPath) then
+  begin
+    MsgBox('Не удалось удалить существующую ссылку current:' + #13#10 + LinkPath, mbError, MB_OK);
+    Result := False;
+    Exit;
+  end;
+
+  Result := Exec('cmd.exe', '/C mklink /J "' + LinkPath + '" "' + TargetPath + '"',
+    '', SW_HIDE, ewWaitUntilTerminated, ResultCode) and (ResultCode = 0);
+
+  if not Result then
+    MsgBox(
+      'Не удалось создать junction current -> версия.' + #13#10 +
+      'Запустите установщик от имени администратора или включите режим разработчика Windows.' + #13#10#13#10 +
+      'Link: ' + LinkPath + #13#10 +
+      'Target: ' + TargetPath,
+      mbError, MB_OK);
+end;
+
+function PathContains(const Path, Entry: String): Boolean;
+begin
+  Result := Pos(';' + Entry + ';', ';' + Path + ';') > 0;
+end;
+
+function NeedsAddPath(const Param: String): Boolean;
+var
+  OrigPath: String;
+begin
+  if not RegQueryStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', OrigPath) then
+  begin
+    Result := True;
+    Exit;
+  end;
+  Result := not PathContains(OrigPath, Param);
+end;
+
+procedure PrependUserPath(const Entry: String);
+var
+  OldPath, NewPath: String;
+begin
+  if not NeedsAddPath(Entry) then
+    Exit;
+  if RegQueryStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', OldPath) then
+  begin
+    if OldPath = '' then
+      NewPath := Entry
+    else
+      NewPath := Entry + ';' + OldPath;
+    RegWriteExpandStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', NewPath);
+  end
+  else
+    RegWriteExpandStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', Entry);
+end;
+
+procedure ActivateOneScriptLikeOvm(const InstallDir: String);
+var
+  VersionDir, CurrentLink, OscriptBin, OldPath, NewPath: String;
+begin
+  VersionDir := InstallDir + '\{#VerMajor}.{#VerMinor}.{#VerRelease}';
+  CurrentLink := InstallDir + '\current';
+  OscriptBin := CurrentLink + '\bin';
+
+  if not CreateDirectoryJunction(CurrentLink, VersionDir) then
+    Exit;
+
+  if InstallOvmSelected then
+  begin
+    RegWriteStringValue(HKEY_CURRENT_USER, 'Environment', 'OVM_INSTALL_PATH', InstallDir);
+
+    RegWriteExpandStringValue(HKEY_CURRENT_USER, 'Environment', 'OVM_OSCRIPTBIN', OscriptBin);
+
+    if RegQueryStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', OldPath) then
+    begin
+      if not PathContains(OldPath, '%OVM_OSCRIPTBIN%') then
+      begin
+        if OldPath = '' then
+          NewPath := '%OVM_OSCRIPTBIN%'
+        else
+          NewPath := '%OVM_OSCRIPTBIN%;' + OldPath;
+        RegWriteExpandStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', NewPath);
+      end;
+    end
+    else
+      RegWriteExpandStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', '%OVM_OSCRIPTBIN%');
+
+    if NeedsAddPath(InstallDir) then
+    begin
+      if RegQueryStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', OldPath) then
+      begin
+        if OldPath = '' then
+          NewPath := InstallDir
+        else
+          NewPath := OldPath + ';' + InstallDir;
+        RegWriteExpandStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', NewPath);
+      end
+      else
+        RegWriteExpandStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', InstallDir);
+    end;
+    Exit;
+  end;
+
+  PrependUserPath(OscriptBin);
+end;
+
+procedure CurStepChanged(CurStep: TSetupStep);
+begin
+  if CurStep = ssPostInstall then
+    ActivateOneScriptLikeOvm(ExpandConstant('{app}'));
+end;
+
+function RemoveFromPath(const Path, Entry: String): String;
+var
+  ResultPath: String;
+begin
+  ResultPath := Path;
+  StringChangeEx(ResultPath, Entry + ';', '', True);
+  StringChangeEx(ResultPath, ';' + Entry, '', True);
+  if ResultPath = Entry then
+    ResultPath := '';
+  Result := ResultPath;
+end;
+
+procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
+var
+  InstallDir, ExistingValue, OldPath, NewPath: String;
+begin
+  if CurUninstallStep = usPostUninstall then
+  begin
+    InstallDir := ExpandConstant('{app}');
+
+    RemoveDirectoryLink(InstallDir + '\current');
+
+    if RegQueryStringValue(HKEY_CURRENT_USER, 'Environment', 'OVM_INSTALL_PATH', ExistingValue) then
+      if ExistingValue = InstallDir then
+        RegDeleteValue(HKEY_CURRENT_USER, 'Environment', 'OVM_INSTALL_PATH');
+
+    if RegQueryStringValue(HKEY_CURRENT_USER, 'Environment', 'OVM_OSCRIPTBIN', ExistingValue) then
+      if ExistingValue = InstallDir + '\current\bin' then
+        RegDeleteValue(HKEY_CURRENT_USER, 'Environment', 'OVM_OSCRIPTBIN');
+
+    if RegQueryStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', OldPath) then
+    begin
+      NewPath := RemoveFromPath(OldPath, '%OVM_OSCRIPTBIN%');
+      NewPath := RemoveFromPath(NewPath, InstallDir + '\current\bin');
+      NewPath := RemoveFromPath(NewPath, InstallDir);
+      if NewPath = '' then
+        RegDeleteValue(HKEY_CURRENT_USER, 'Environment', 'Path')
+      else
+        RegWriteExpandStringValue(HKEY_CURRENT_USER, 'Environment', 'Path', NewPath);
+    end;
+  end;
+end;