diff --git a/src/windows-emulator/devices/afd_endpoint.cpp b/src/windows-emulator/devices/afd_endpoint.cpp
index 84622f5d..46b83939 100644
--- a/src/windows-emulator/devices/afd_endpoint.cpp
+++ b/src/windows-emulator/devices/afd_endpoint.cpp
@@ -474,7 +474,7 @@ namespace
             this->clear_pending_state();
         }
 
-        void deserialize(utils::buffer_deserializer& buffer) override
+        void deserialize_object(utils::buffer_deserializer& buffer) override
         {
             buffer.read_optional(this->creation_data);
             this->setup();
@@ -484,7 +484,7 @@ namespace
             buffer.read_optional(this->timeout_);
         }
 
-        void serialize(utils::buffer_serializer& buffer) const override
+        void serialize_object(utils::buffer_serializer& buffer) const override
         {
             buffer.write_optional(this->creation_data);
             buffer.write_optional(this->require_poll_);
diff --git a/src/windows-emulator/handles.hpp b/src/windows-emulator/handles.hpp
index 0abf1887..962b1a9f 100644
--- a/src/windows-emulator/handles.hpp
+++ b/src/windows-emulator/handles.hpp
@@ -111,14 +111,44 @@ namespace handle_detail
     };
 }
 
+class ref_counted_object
+{
+  public:
+    virtual ~ref_counted_object() = default;
+
+    uint32_t ref_count{1};
+
+    void serialize(utils::buffer_serializer& buffer) const
+    {
+        buffer.write(this->ref_count);
+        this->serialize_object(buffer);
+    }
+
+    void deserialize(utils::buffer_deserializer& buffer)
+    {
+        buffer.read(this->ref_count);
+        this->deserialize_object(buffer);
+    }
+
+    static bool deleter(ref_counted_object& e)
+    {
+        return --e.ref_count == 0;
+    }
+
+  private:
+    virtual void serialize_object(utils::buffer_serializer& buffer) const = 0;
+    virtual void deserialize_object(utils::buffer_deserializer& buffer) = 0;
+};
+
 struct generic_handle_store
 {
     virtual ~generic_handle_store() = default;
     virtual bool erase(handle h) = 0;
+    virtual std::optional<handle> duplicate(handle h) = 0;
 };
 
 template <handle_types::type Type, typename T, uint32_t IndexShift = 0>
-    requires(utils::Serializable<T>)
+    requires(utils::Serializable<T> && std::is_base_of_v<ref_counted_object, T>)
 class handle_store : public generic_handle_store
 {
   public:
@@ -189,6 +219,18 @@ class handle_store : public generic_handle_store
         return this->store_.size();
     }
 
+    std::optional<handle> duplicate(const handle h) override
+    {
+        auto* entry = this->get(h);
+        if (!entry)
+        {
+            return std::nullopt;
+        }
+
+        ++static_cast<ref_counted_object*>(entry)->ref_count;
+        return h;
+    }
+
     bool erase(const typename value_map::iterator& entry)
     {
         if (this->block_mutation_)
diff --git a/src/windows-emulator/io_device.hpp b/src/windows-emulator/io_device.hpp
index c922decc..43e8b1cf 100644
--- a/src/windows-emulator/io_device.hpp
+++ b/src/windows-emulator/io_device.hpp
@@ -76,10 +76,10 @@ inline void write_io_status(const emulator_object<IO_STATUS_BLOCK<EmulatorTraits
     }
 }
 
-struct io_device
+struct io_device : ref_counted_object
 {
     io_device() = default;
-    virtual ~io_device() = default;
+    ~io_device() override = default;
 
     io_device(io_device&&) = default;
     io_device& operator=(io_device&&) = default;
@@ -100,9 +100,6 @@ struct io_device
         (void)win_emu;
     }
 
-    virtual void serialize(utils::buffer_serializer& buffer) const = 0;
-    virtual void deserialize(utils::buffer_deserializer& buffer) = 0;
-
     NTSTATUS execute_ioctl(windows_emulator& win_emu, const io_device_context& c)
     {
         if (c.io_status_block)
@@ -122,11 +119,11 @@ struct stateless_device : io_device
     {
     }
 
-    void serialize(utils::buffer_serializer&) const override
+    void serialize_object(utils::buffer_serializer&) const override
     {
     }
 
-    void deserialize(utils::buffer_deserializer&) override
+    void deserialize_object(utils::buffer_deserializer&) override
     {
     }
 };
@@ -157,7 +154,7 @@ class io_device_container : public io_device
         return this->device_->work(win_emu);
     }
 
-    void serialize(utils::buffer_serializer& buffer) const override
+    void serialize_object(utils::buffer_serializer& buffer) const override
     {
         this->assert_validity();
 
@@ -165,7 +162,7 @@ class io_device_container : public io_device
         this->device_->serialize(buffer);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer) override
+    void deserialize_object(utils::buffer_deserializer& buffer) override
     {
         buffer.read_string(this->device_name_);
         this->setup();
diff --git a/src/windows-emulator/process_context.hpp b/src/windows-emulator/process_context.hpp
index 567a9d00..be6b6688 100644
--- a/src/windows-emulator/process_context.hpp
+++ b/src/windows-emulator/process_context.hpp
@@ -27,26 +27,6 @@
 
 class windows_emulator;
 
-struct ref_counted_object
-{
-    uint32_t ref_count{1};
-
-    void serialize(utils::buffer_serializer& buffer) const
-    {
-        buffer.write(this->ref_count);
-    }
-
-    void deserialize(utils::buffer_deserializer& buffer)
-    {
-        buffer.read(this->ref_count);
-    }
-
-    static bool deleter(ref_counted_object& e)
-    {
-        return --e.ref_count == 0;
-    }
-};
-
 struct event : ref_counted_object
 {
     bool signaled{};
@@ -65,22 +45,18 @@ struct event : ref_counted_object
         return res;
     }
 
-    void serialize(utils::buffer_serializer& buffer) const
+    void serialize_object(utils::buffer_serializer& buffer) const override
     {
         buffer.write(this->signaled);
         buffer.write(this->type);
         buffer.write(this->name);
-
-        ref_counted_object::serialize(buffer);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer)
+    void deserialize_object(utils::buffer_deserializer& buffer) override
     {
         buffer.read(this->signaled);
         buffer.read(this->type);
         buffer.read(this->name);
-
-        ref_counted_object::deserialize(buffer);
     }
 };
 
@@ -121,22 +97,18 @@ struct mutant : ref_counted_object
         return {old_count, true};
     }
 
-    void serialize(utils::buffer_serializer& buffer) const
+    void serialize_object(utils::buffer_serializer& buffer) const override
     {
         buffer.write(this->locked_count);
         buffer.write(this->owning_thread_id);
         buffer.write(this->name);
-
-        ref_counted_object::serialize(buffer);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer)
+    void deserialize_object(utils::buffer_deserializer& buffer) override
     {
         buffer.read(this->locked_count);
         buffer.read(this->owning_thread_id);
         buffer.read(this->name);
-
-        ref_counted_object::deserialize(buffer);
     }
 };
 
@@ -173,7 +145,7 @@ struct file_enumeration_state
     }
 };
 
-struct file
+struct file : ref_counted_object
 {
     utils::file_handle handle{};
     std::u16string name{};
@@ -189,14 +161,14 @@ struct file
         return !this->is_file();
     }
 
-    void serialize(utils::buffer_serializer& buffer) const
+    void serialize_object(utils::buffer_serializer& buffer) const override
     {
         // TODO: Serialize handle
         buffer.write(this->name);
         buffer.write_optional(this->enumeration_state);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer)
+    void deserialize_object(utils::buffer_deserializer& buffer) override
     {
         buffer.read(this->name);
         buffer.read_optional(this->enumeration_state);
@@ -204,7 +176,7 @@ struct file
     }
 };
 
-struct section
+struct section : ref_counted_object
 {
     std::u16string name{};
     std::u16string file_name{};
@@ -217,7 +189,7 @@ struct section
         return this->allocation_attributes & SEC_IMAGE;
     }
 
-    void serialize(utils::buffer_serializer& buffer) const
+    void serialize_object(utils::buffer_serializer& buffer) const override
     {
         buffer.write(this->name);
         buffer.write(this->file_name);
@@ -226,7 +198,7 @@ struct section
         buffer.write(this->allocation_attributes);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer)
+    void deserialize_object(utils::buffer_deserializer& buffer) override
     {
         buffer.read(this->name);
         buffer.read(this->file_name);
@@ -267,37 +239,33 @@ struct semaphore : ref_counted_object
         return {old_count, true};
     }
 
-    void serialize(utils::buffer_serializer& buffer) const
+    void serialize_object(utils::buffer_serializer& buffer) const override
     {
         buffer.write(this->name);
         buffer.write(this->current_count);
         buffer.write(this->max_count);
-
-        ref_counted_object::serialize(buffer);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer)
+    void deserialize_object(utils::buffer_deserializer& buffer) override
     {
         buffer.read(this->name);
         buffer.read(this->current_count);
         buffer.read(this->max_count);
-
-        ref_counted_object::deserialize(buffer);
     }
 };
 
-struct port
+struct port : ref_counted_object
 {
     std::u16string name{};
     uint64_t view_base{};
 
-    void serialize(utils::buffer_serializer& buffer) const
+    void serialize_object(utils::buffer_serializer& buffer) const override
     {
         buffer.write(this->name);
         buffer.write(this->view_base);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer)
+    void deserialize_object(utils::buffer_deserializer& buffer) override
     {
         buffer.read(this->name);
         buffer.read(this->view_base);
@@ -439,7 +407,7 @@ class emulator_thread : public ref_counted_object
         }
     }
 
-    void serialize(utils::buffer_serializer& buffer) const
+    void serialize_object(utils::buffer_serializer& buffer) const
     {
         if (this->marker.was_moved())
         {
@@ -470,7 +438,7 @@ class emulator_thread : public ref_counted_object
         buffer.write_vector(this->last_registers);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer)
+    void deserialize_object(utils::buffer_deserializer& buffer)
     {
         if (this->marker.was_moved())
         {
diff --git a/src/windows-emulator/registry/registry_manager.hpp b/src/windows-emulator/registry/registry_manager.hpp
index 7b6f0c55..c5160d76 100644
--- a/src/windows-emulator/registry/registry_manager.hpp
+++ b/src/windows-emulator/registry/registry_manager.hpp
@@ -3,19 +3,20 @@
 #include "../std_include.hpp"
 #include "hive_parser.hpp"
 #include "serialization_helper.hpp"
+#include "../handles.hpp"
 
-struct registry_key
+struct registry_key : ref_counted_object
 {
     utils::path_key hive{};
     utils::path_key path{};
 
-    void serialize(utils::buffer_serializer& buffer) const
+    void serialize_object(utils::buffer_serializer& buffer) const override
     {
         buffer.write(this->hive);
         buffer.write(this->path);
     }
 
-    void deserialize(utils::buffer_deserializer& buffer)
+    void deserialize_object(utils::buffer_deserializer& buffer) override
     {
         buffer.read(this->hive);
         buffer.read(this->path);
diff --git a/src/windows-emulator/syscalls.cpp b/src/windows-emulator/syscalls.cpp
index 7df12fd7..e17d1962 100644
--- a/src/windows-emulator/syscalls.cpp
+++ b/src/windows-emulator/syscalls.cpp
@@ -1108,8 +1108,20 @@ namespace
             return STATUS_SUCCESS;
         }
 
-        c.win_emu.log.error("Duplicating non-pseudo object not supported yet!\n");
-        return STATUS_NOT_SUPPORTED;
+        auto* store = get_handle_store(c.proc, source_handle);
+        if (!store)
+        {
+            return STATUS_NOT_SUPPORTED;
+        }
+
+        const auto new_handle = store->duplicate(source_handle);
+        if (!new_handle)
+        {
+            return STATUS_INVALID_HANDLE;
+        }
+
+        target_handle.write(*new_handle);
+        return STATUS_SUCCESS;
     }
 
     NTSTATUS handle_NtQuerySystemInformationEx(const syscall_context& c, const uint32_t info_class,
@@ -3302,6 +3314,11 @@ namespace
         return handle_NtUserGetDCEx();
     }
 
+    NTSTATUS handle_NtUserGetWindowDC()
+    {
+        return 1;
+    }
+
     NTSTATUS handle_NtUserReleaseDC()
     {
         return STATUS_SUCCESS;
@@ -3734,6 +3751,7 @@ void syscall_dispatcher::add_handlers(std::map<std::string, syscall_handler>& ha
     add_handler(NtUserModifyUserStartupInfoFlags);
     add_handler(NtUserGetDCEx);
     add_handler(NtUserGetDC);
+    add_handler(NtUserGetWindowDC);
     add_handler(NtUserGetDpiForCurrentProcess);
     add_handler(NtReleaseSemaphore);
     add_handler(NtEnumerateKey);