diff --git a/UnleashedRecomp/CMakeLists.txt b/UnleashedRecomp/CMakeLists.txt
index 0d065b8..4b22df6 100644
--- a/UnleashedRecomp/CMakeLists.txt
+++ b/UnleashedRecomp/CMakeLists.txt
@@ -67,6 +67,11 @@ set(SWA_KERNEL_CXX_SOURCES
     "kernel/io/file_system.cpp"
 )
 
+set(SWA_OS_CXX_SOURCES
+    "os/win32/process_win32.cpp"
+    "os/process.cpp"
+)
+
 set(SWA_CPU_CXX_SOURCES
     "cpu/guest_thread.cpp"
     "cpu/code_cache.cpp"
@@ -163,6 +168,7 @@ set(SWA_CXX_SOURCES
     "stdafx.cpp"
     
     ${SWA_KERNEL_CXX_SOURCES}
+    ${SWA_OS_CXX_SOURCES}
     ${SWA_CPU_CXX_SOURCES}
     ${SWA_GPU_CXX_SOURCES}
     ${SWA_APU_CXX_SOURCES}
diff --git a/UnleashedRecomp/app.cpp b/UnleashedRecomp/app.cpp
index a317d28..aa0daaa 100644
--- a/UnleashedRecomp/app.cpp
+++ b/UnleashedRecomp/app.cpp
@@ -3,18 +3,24 @@
 #include <kernel/function.h>
 #include <ui/window.h>
 #include <patches/audio_patches.h>
+#include <os/process.h>
 
-bool g_isAppInit = false;
-bool g_isMissingDLC = false;
+void App::Exit(std::vector<std::string> restartArgs)
+{
+    if (restartArgs.size())
+        os::process::StartProcess(os::process::GetExecutablePath(), restartArgs, os::process::GetWorkingDirectory());
 
-double g_deltaTime;
+#if _WIN32
+    ExitProcess(0);
+#endif
+}
 
 // CApplication::Ctor
 PPC_FUNC_IMPL(__imp__sub_824EB490);
 PPC_FUNC(sub_824EB490)
 {
-    g_isAppInit = true;
-    g_isMissingDLC = !Installer::checkAllDLC(GetGamePath());
+    App::s_isInit = true;
+    App::s_isMissingDLC = !Installer::checkAllDLC(GetGamePath());
 
     __imp__sub_824EB490(ctx, base);
 }
@@ -23,13 +29,13 @@ PPC_FUNC(sub_824EB490)
 PPC_FUNC_IMPL(__imp__sub_822C1130);
 PPC_FUNC(sub_822C1130)
 {
-    g_deltaTime = ctx.f1.f64;
+    App::s_deltaTime = ctx.f1.f64;
 
     SDL_PumpEvents();
     SDL_FlushEvents(SDL_FIRSTEVENT, SDL_LASTEVENT);
 
     Window::Update();
-    AudioPatches::Update(g_deltaTime);
+    AudioPatches::Update(App::s_deltaTime);
 
     __imp__sub_822C1130(ctx, base);
 }
diff --git a/UnleashedRecomp/app.h b/UnleashedRecomp/app.h
index 4932a41..89849a6 100644
--- a/UnleashedRecomp/app.h
+++ b/UnleashedRecomp/app.h
@@ -1,6 +1,12 @@
 #pragma once
 
-extern bool g_isAppInit;
-extern bool g_isMissingDLC;
+class App
+{
+public:
+    inline static bool s_isInit;
+    inline static bool s_isMissingDLC;
 
-extern double g_deltaTime;
+    inline static double s_deltaTime;
+
+    static void Exit(std::vector<std::string> restartArgs = {});
+};
diff --git a/UnleashedRecomp/gpu/imgui_snapshot.cpp b/UnleashedRecomp/gpu/imgui_snapshot.cpp
index 0c5f5f6..6714906 100644
--- a/UnleashedRecomp/gpu/imgui_snapshot.cpp
+++ b/UnleashedRecomp/gpu/imgui_snapshot.cpp
@@ -222,7 +222,7 @@ void ImFontAtlasSnapshot::GenerateGlyphRanges()
         }
     }
 
-    if (g_isAppInit)
+    if (App::s_isInit)
     {
         for (size_t i = XDBF_LANGUAGE_ENGLISH; i <= XDBF_LANGUAGE_ITALIAN; i++)
         {
diff --git a/UnleashedRecomp/os/.gitignore b/UnleashedRecomp/os/.gitignore
new file mode 100644
index 0000000..a049fed
--- /dev/null
+++ b/UnleashedRecomp/os/.gitignore
@@ -0,0 +1 @@
+![Ww][Ii][Nn]32/
\ No newline at end of file
diff --git a/UnleashedRecomp/os/process.cpp b/UnleashedRecomp/os/process.cpp
new file mode 100644
index 0000000..68b06d7
--- /dev/null
+++ b/UnleashedRecomp/os/process.cpp
@@ -0,0 +1,17 @@
+#include "process.h"
+#include "process_detail.h"
+
+std::filesystem::path os::process::GetExecutablePath()
+{
+    return detail::GetExecutablePath();
+}
+
+std::filesystem::path os::process::GetWorkingDirectory()
+{
+    return detail::GetWorkingDirectory();
+}
+
+bool os::process::StartProcess(const std::filesystem::path path, const std::vector<std::string> args, std::filesystem::path work)
+{
+    return detail::StartProcess(path, args, work);
+}
diff --git a/UnleashedRecomp/os/process.h b/UnleashedRecomp/os/process.h
new file mode 100644
index 0000000..d9af717
--- /dev/null
+++ b/UnleashedRecomp/os/process.h
@@ -0,0 +1,8 @@
+#pragma once
+
+namespace os::process
+{
+    std::filesystem::path GetExecutablePath();
+    std::filesystem::path GetWorkingDirectory();
+    bool StartProcess(const std::filesystem::path path, const std::vector<std::string> args, std::filesystem::path work = {});
+}
diff --git a/UnleashedRecomp/os/process_detail.h b/UnleashedRecomp/os/process_detail.h
new file mode 100644
index 0000000..e4a7a45
--- /dev/null
+++ b/UnleashedRecomp/os/process_detail.h
@@ -0,0 +1,8 @@
+#pragma once
+
+namespace os::process::detail
+{
+    std::filesystem::path GetExecutablePath();
+    std::filesystem::path GetWorkingDirectory();
+    bool StartProcess(const std::filesystem::path path, const std::vector<std::string> args, std::filesystem::path work = {});
+}
diff --git a/UnleashedRecomp/os/win32/process_win32.cpp b/UnleashedRecomp/os/win32/process_win32.cpp
new file mode 100644
index 0000000..147127a
--- /dev/null
+++ b/UnleashedRecomp/os/win32/process_win32.cpp
@@ -0,0 +1,45 @@
+#include <os/process_detail.h>
+
+std::filesystem::path os::process::detail::GetExecutablePath()
+{
+    char exePath[MAX_PATH];
+
+    if (!GetModuleFileNameA(nullptr, exePath, MAX_PATH))
+        return std::filesystem::path();
+
+    return std::filesystem::path(exePath);
+}
+
+std::filesystem::path os::process::detail::GetWorkingDirectory()
+{
+    char workPath[MAX_PATH];
+
+    if (!GetCurrentDirectoryA(MAX_PATH, workPath))
+        return std::filesystem::path();
+
+    return std::filesystem::path(workPath);
+}
+
+bool os::process::detail::StartProcess(const std::filesystem::path path, const std::vector<std::string> args, std::filesystem::path work)
+{
+    if (path.empty())
+        return false;
+
+    if (work.empty())
+        work = path.parent_path();
+
+    auto cli = path.string();
+    for (auto& arg : args)
+        cli += " " + arg;
+
+    STARTUPINFOA startInfo{ sizeof(STARTUPINFOA) };
+    PROCESS_INFORMATION procInfo{};
+
+    if (!CreateProcessA(path.string().c_str(), cli.data(), nullptr, nullptr, false, 0, nullptr, work.string().c_str(), &startInfo, &procInfo))
+        return false;
+
+    CloseHandle(procInfo.hProcess);
+    CloseHandle(procInfo.hThread);
+
+    return true;
+}
diff --git a/UnleashedRecomp/patches/fps_patches.cpp b/UnleashedRecomp/patches/fps_patches.cpp
index 289fea5..f6f2c6b 100644
--- a/UnleashedRecomp/patches/fps_patches.cpp
+++ b/UnleashedRecomp/patches/fps_patches.cpp
@@ -41,12 +41,12 @@ static double ComputeLerpFactor(double t, double deltaTime)
 // delta time, as it might be time scaled and not match with 30 FPS behavior.
 void CameraLerpFixMidAsmHook(PPCRegister& t)
 {
-    t.f64 = ComputeLerpFactor(t.f64, g_deltaTime);
+    t.f64 = ComputeLerpFactor(t.f64, App::s_deltaTime);
 }
 
 void CameraTargetSideOffsetLerpFixMidAsmHook(PPCVRegister& v13, PPCVRegister& v62)
 {
-    float factor = float(ComputeLerpFactor(double(v13.f32[0] * v62.f32[0]), g_deltaTime));
+    float factor = float(ComputeLerpFactor(double(v13.f32[0] * v62.f32[0]), App::s_deltaTime));
 
     for (size_t i = 0; i < 4; i++)
     {
diff --git a/UnleashedRecomp/patches/ui/CHudPause_patches.cpp b/UnleashedRecomp/patches/ui/CHudPause_patches.cpp
index 9e57e6d..4627389 100644
--- a/UnleashedRecomp/patches/ui/CHudPause_patches.cpp
+++ b/UnleashedRecomp/patches/ui/CHudPause_patches.cpp
@@ -117,11 +117,11 @@ PPC_FUNC(sub_824B0930)
     auto pHudPause = (SWA::CHudPause*)g_memory.Translate(ctx.r3.u32);
     auto pInputState = SWA::CInputState::GetInstance();
 
-    g_achievementMenuIntroTime += g_deltaTime;
+    g_achievementMenuIntroTime += App::s_deltaTime;
 
     if (g_isAchievementMenuOutro)
     {
-        g_achievementMenuOutroTime += g_deltaTime;
+        g_achievementMenuOutroTime += App::s_deltaTime;
 
         // Re-open pause menu after achievement menu closes with delay.
         if (g_achievementMenuOutroTime >= g_achievementMenuOutroThreshold)
diff --git a/UnleashedRecomp/patches/ui/CTitleStateIntro_patches.cpp b/UnleashedRecomp/patches/ui/CTitleStateIntro_patches.cpp
index 07523e9..2022f80 100644
--- a/UnleashedRecomp/patches/ui/CTitleStateIntro_patches.cpp
+++ b/UnleashedRecomp/patches/ui/CTitleStateIntro_patches.cpp
@@ -3,6 +3,7 @@
 #include <locale/locale.h>
 #include <ui/fader.h>
 #include <ui/message_window.h>
+#include <app.h>
 
 static bool g_quitMessageOpen = false;
 static bool g_quitMessageFaderBegun = false;
@@ -23,7 +24,7 @@ static bool ProcessQuitMessage()
         switch (g_quitMessageResult)
         {
             case 0:
-                Fader::FadeOut(1, []() { ExitProcess(0); });
+                Fader::FadeOut(1, []() { App::Exit(); });
                 g_quitMessageFaderBegun = true;
                 break;
 
diff --git a/UnleashedRecomp/patches/ui/CTitleStateMenu_patches.cpp b/UnleashedRecomp/patches/ui/CTitleStateMenu_patches.cpp
index f2fd944..e7f1516 100644
--- a/UnleashedRecomp/patches/ui/CTitleStateMenu_patches.cpp
+++ b/UnleashedRecomp/patches/ui/CTitleStateMenu_patches.cpp
@@ -20,7 +20,7 @@ static bool ProcessInstallMessage()
     if (g_installMessageFaderBegun)
         return true;
 
-    auto& str = g_isMissingDLC
+    auto& str = App::s_isMissingDLC
         ? Localise("Installer_Message_TitleMissingDLC")
         : Localise("Installer_Message_Title");
 
@@ -31,8 +31,7 @@ static bool ProcessInstallMessage()
         switch (g_installMessageResult)
         {
             case 0:
-                // TODO: replace ExitProcess with restart method using --install-dlc argument.
-                Fader::FadeOut(1, []() { ExitProcess(0); });
+                Fader::FadeOut(1, []() { App::Exit({ "--install-dlc" }); });
                 g_installMessageFaderBegun = true;
                 break;
 
diff --git a/UnleashedRecomp/ui/button_guide.cpp b/UnleashedRecomp/ui/button_guide.cpp
index 30f7a1d..e7be8fc 100644
--- a/UnleashedRecomp/ui/button_guide.cpp
+++ b/UnleashedRecomp/ui/button_guide.cpp
@@ -63,7 +63,7 @@ std::tuple<std::tuple<ImVec2, ImVec2>, GuestTexture*> GetButtonIcon(EButtonIcon
     std::tuple<ImVec2, ImVec2> btn;
     GuestTexture* texture;
 
-    auto isPlayStation = g_isAppInit
+    auto isPlayStation = App::s_isInit
         ? Config::ControllerIcons == EControllerIcons::PlayStation
         : hid::detail::g_inputDevice == hid::detail::EInputDevice::PlayStation;
 
diff --git a/UnleashedRecomp/ui/message_window.cpp b/UnleashedRecomp/ui/message_window.cpp
index b8d47e6..d12bb7f 100644
--- a/UnleashedRecomp/ui/message_window.cpp
+++ b/UnleashedRecomp/ui/message_window.cpp
@@ -65,7 +65,7 @@ public:
         {
             case SDL_KEYDOWN:
             {
-                if (g_isAppInit)
+                if (App::s_isInit)
                     break;
 
                 switch (event->key.keysym.scancode)
@@ -93,7 +93,7 @@ public:
 
             case SDL_MOUSEBUTTONDOWN:
             {
-                if (g_isAppInit)
+                if (App::s_isInit)
                     break;
 
                 g_isAccepted = true;
@@ -273,8 +273,8 @@ void MessageWindow::Draw()
     auto textMarginX = Scale(37);
     auto textMarginY = Scale(45);
 
-    bool isController = g_isAppInit ? true : hid::detail::IsInputDeviceController();
-    bool isKeyboard = g_isAppInit ? false : hid::detail::g_inputDevice == hid::detail::EInputDevice::Keyboard;
+    bool isController = App::s_isInit ? true : hid::detail::IsInputDeviceController();
+    bool isKeyboard = App::s_isInit ? false : hid::detail::g_inputDevice == hid::detail::EInputDevice::Keyboard;
 
     if (DrawContainer(g_appearTime, centre, { textSize.x / 2 + textMarginX, textSize.y / 2 + textMarginY }, !g_isControlsVisible))
     {
diff --git a/UnleashedRecomp/ui/window.cpp b/UnleashedRecomp/ui/window.cpp
index 68ebab6..6612160 100644
--- a/UnleashedRecomp/ui/window.cpp
+++ b/UnleashedRecomp/ui/window.cpp
@@ -2,6 +2,7 @@
 #include "sdl_listener.h"
 #include <user/config.h>
 #include <SDL_syswm.h>
+#include <app.h>
 
 bool m_isFullscreenKeyReleased = true;
 bool m_isResizing = false;
@@ -18,7 +19,7 @@ int Window_OnSDLEvent(void*, SDL_Event* event)
     {
         case SDL_QUIT:
             Config::Save();
-            ExitProcess(0);
+            App::Exit();
             break;
 
         case SDL_KEYDOWN: