diff --git a/src/Style.cpp b/src/Style.cpp
index 347b2c367..4ffd6c488 100644
--- a/src/Style.cpp
+++ b/src/Style.cpp
@@ -11,8 +11,8 @@
 
 namespace style {
 	ui::Colour Colour::InformationTitle = ui::Colour(140, 140, 255);
-	ui::Colour Colour::WarningTitle = ui::Colour(255, 255, 50);
-	ui::Colour Colour::ErrorTitle = ui::Colour(255, 20, 20);
+	ui::Colour Colour::WarningTitle = ui::Colour(255, 216, 32);
+	ui::Colour Colour::ErrorTitle = ui::Colour(255, 64, 32);
 	
 	ui::Colour Colour::ConfirmButton = ui::Colour(255, 255, 50);
 	
diff --git a/src/Update.cpp b/src/Update.cpp
new file mode 100644
index 000000000..cee0b7c51
--- /dev/null
+++ b/src/Update.cpp
@@ -0,0 +1,187 @@
+#include <stdio.h>
+#include <stdlib.h>
+#ifndef WIN32
+#include <sys/param.h>
+#endif
+#if !defined(MACOSX) && !defined(BSD)
+#include <malloc.h>
+#endif
+#include <string.h>
+
+#ifdef WIN32
+#include <windows.h>
+#else
+#include <unistd.h>
+#include <sys/stat.h>
+#endif
+#ifdef MACOSX
+#include <mach-o/dyld.h>
+#include <errno.h>
+#endif
+
+#include <Update.h>
+#include <Misc.h>
+
+/*char *exe_name(void)
+{
+#if defined WIN32
+	char *name= (char *)malloc(64);
+	DWORD max=64, res;
+	while ((res = GetModuleFileName(NULL, name, max)) >= max)
+	{
+#elif defined MACOSX
+	char *fn=malloc(64),*name=malloc(PATH_MAX);
+	uint32_t max=64, res;
+	if (_NSGetExecutablePath(fn, &max) != 0)
+	{
+		fn = realloc(fn, max);
+		_NSGetExecutablePath(fn, &max);
+	}
+	if (realpath(fn, name) == NULL)
+	{
+		free(fn);
+		free(name);
+		return NULL;
+	}
+	res = 1;
+#else
+	char fn[64], *name=malloc(64);
+	size_t max=64, res;
+	sprintf(fn, "/proc/self/exe");
+	memset(name, 0, max);
+	while ((res = readlink(fn, name, max)) >= max-1)
+	{
+#endif
+#ifndef MACOSX
+		max *= 2;
+		name = (char*)realloc(name, max);
+		memset(name, 0, max);
+	}
+#endif
+	if (res <= 0)
+	{
+		free(name);
+		return NULL;
+	}
+	return name;
+}*/
+
+int update_start(char *data, int len)
+{
+	char *self=exe_name(), *temp;
+#ifdef WIN32
+	char *p;
+#endif
+	FILE *f;
+	int res = 1;
+
+	if (!self)
+		return 1;
+
+#ifdef WIN32
+	temp = (char*)malloc(strlen(self)+12);
+	strcpy(temp, self);
+	p = temp + strlen(temp) - 4;
+	if (_stricmp(p, ".exe"))
+		p += 4;
+	strcpy(p, "_update.exe");
+
+	if (!MoveFile(self, temp))
+		goto fail;
+
+	f = fopen(self, "wb");
+	if (!f)
+		goto fail;
+	if (fwrite(data, 1, len, f) != len)
+	{
+		fclose(f);
+		DeleteFile(self);
+		goto fail;
+	}
+	fclose(f);
+
+	if ((int)ShellExecute(NULL, "open", self, NULL, NULL, SW_SHOWNORMAL) <= 32)
+	{
+		DeleteFile(self);
+		goto fail;
+	}
+
+	return 0;
+#else
+	temp = malloc(strlen(self)+8);
+	strcpy(temp, self);
+	strcat(temp, "-update");
+
+	f = fopen(temp, "w");
+	if (!f)
+		goto fail;
+	if (fwrite(data, 1, len, f) != len)
+	{
+		fclose(f);
+		unlink(temp);
+		goto fail;
+	}
+	fclose(f);
+
+	if (chmod(temp, 0755))
+	{
+		unlink(temp);
+		goto fail;
+	}
+
+	if (rename(temp, self))
+	{
+		unlink(temp);
+		goto fail;
+	}
+
+	execl(self, "powder-update", NULL);
+#endif
+
+fail:
+	free(temp);
+	free(self);
+	return res;
+}
+
+int update_finish(void)
+{
+#ifdef WIN32
+	char *temp, *self=exe_name(), *p;
+	int timeout = 60, err;
+
+	temp = (char*)malloc(strlen(self)+12);
+	strcpy(temp, self);
+	p = temp + strlen(temp) - 4;
+	if (_stricmp(p, ".exe"))
+		p += 4;
+	strcpy(p, "_update.exe");
+
+	while (!DeleteFile(temp))
+	{
+		err = GetLastError();
+		if (err == ERROR_FILE_NOT_FOUND)
+		{
+			// just as well, then
+			free(temp);
+			return 0;
+		}
+		Sleep(500);
+		timeout--;
+		if (timeout <= 0)
+		{
+			free(temp);
+			return 1;
+		}
+	}
+	free(temp);
+#endif
+	return 0;
+}
+
+void update_cleanup(void)
+{
+#ifdef WIN32
+	update_finish();
+#endif
+}
diff --git a/src/Update.h b/src/Update.h
new file mode 100644
index 000000000..118396b30
--- /dev/null
+++ b/src/Update.h
@@ -0,0 +1,16 @@
+/*
+ * Update.h
+ *
+ *  Created on: Jun 21, 2012
+ *      Author: Simon
+ */
+
+#ifndef UPDATE_H_
+#define UPDATE_H_
+
+//char *exe_name(void);
+int update_start(char *data, int len);
+int update_finish(void);
+void update_cleanup(void);
+
+#endif /* UPDATE_H_ */
diff --git a/src/dialogues/ConfirmPrompt.cpp b/src/dialogues/ConfirmPrompt.cpp
index 6943555bd..91a13267e 100644
--- a/src/dialogues/ConfirmPrompt.cpp
+++ b/src/dialogues/ConfirmPrompt.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "ConfirmPrompt.h"
+#include "Style.h"
 #include "interface/Textblock.h"
 #include "interface/Button.h"
 
@@ -15,7 +16,7 @@ ConfirmPrompt::ConfirmPrompt(std::string title, std::string message, ConfirmDial
 {
 	int width, height;
 	ui::Label * titleLabel = new ui::Label(ui::Point(4, 5), ui::Point(Size.X-8, 15), title);
-	titleLabel->SetTextColour(ui::Colour(220, 220, 50));
+	titleLabel->SetTextColour(style::Colour::WarningTitle);
 	titleLabel->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
 	titleLabel->Appearance.VerticalAlign = ui::Appearance::AlignMiddle;
 	AddComponent(titleLabel);
@@ -55,7 +56,7 @@ ConfirmPrompt::ConfirmPrompt(std::string title, std::string message, ConfirmDial
 	ui::Button * okayButton = new ui::Button(ui::Point(Size.X-76, Size.Y-16), ui::Point(76, 16), "Continue");
 	okayButton->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
 	okayButton->Appearance.VerticalAlign = ui::Appearance::AlignMiddle;
-	okayButton->Appearance.TextInactive = ui::Colour(220, 220, 50);
+	okayButton->Appearance.TextInactive = style::Colour::WarningTitle;
 	okayButton->SetActionCallback(new CloseAction(this, ResultOkay));
 	AddComponent(okayButton);
 
diff --git a/src/dialogues/ErrorMessage.cpp b/src/dialogues/ErrorMessage.cpp
index ebcfeae5d..ccd4a8ebe 100644
--- a/src/dialogues/ErrorMessage.cpp
+++ b/src/dialogues/ErrorMessage.cpp
@@ -5,6 +5,7 @@
  *      Author: Simon
  */
 
+#include "Style.h"
 #include "ErrorMessage.h"
 #include "interface/Button.h"
 #include "interface/Label.h"
@@ -13,7 +14,7 @@ ErrorMessage::ErrorMessage(std::string title, std::string message):
 	ui::Window(ui::Point(-1, -1), ui::Point(200, 75))
 {
 	ui::Label * titleLabel = new ui::Label(ui::Point(4, 5), ui::Point(Size.X-8, 16), title);
-	titleLabel->SetTextColour(ui::Colour(200, 100, 50));
+	titleLabel->SetTextColour(style::Colour::ErrorTitle);
 	titleLabel->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
 	titleLabel->Appearance.VerticalAlign = ui::Appearance::AlignMiddle;
 	AddComponent(titleLabel);
diff --git a/src/game/GameController.cpp b/src/game/GameController.cpp
index 71e485d39..affb88572 100644
--- a/src/game/GameController.cpp
+++ b/src/game/GameController.cpp
@@ -13,6 +13,7 @@
 #include "dialogues/ConfirmPrompt.h"
 #include "GameModelException.h"
 #include "simulation/Air.h"
+#include "update/UpdateActivity.h"
 #include "Notification.h"
 
 using namespace std;
@@ -675,5 +676,6 @@ void GameController::RemoveNotification(Notification * notification)
 void GameController::RunUpdater()
 {
 	Exit();
+	new UpdateActivity();
 }
 
diff --git a/src/simulation/SaveRenderer.cpp b/src/simulation/SaveRenderer.cpp
index 3d0e7c7eb..79dd4217b 100644
--- a/src/simulation/SaveRenderer.cpp
+++ b/src/simulation/SaveRenderer.cpp
@@ -20,6 +20,7 @@ SaveRenderer::SaveRenderer(){
 Thumbnail * SaveRenderer::Render(GameSave * save)
 {
 	int width, height;
+	Thumbnail * tempThumb;
 #ifdef OGLR
 	width = save->blockWidth*CELL;
 	height = save->blockHeight*CELL;
@@ -27,7 +28,7 @@ Thumbnail * SaveRenderer::Render(GameSave * save)
 	VideoBuffer buffer(width, height);
 	buffer.BlendCharacter((width/2)-3, (height/2)-5, 'x', 255, 255, 255, 255);
 
-	Thumbnail * tempThumb = new Thumbnail(0, 0, buffer.Buffer, ui::Point(width, height));
+	tempThumb = new Thumbnail(0, 0, buffer.Buffer, ui::Point(width, height));
 
 	return tempThumb;
 #else
diff --git a/src/tasks/Task.cpp b/src/tasks/Task.cpp
index dfb8a2ba0..7be013e4e 100644
--- a/src/tasks/Task.cpp
+++ b/src/tasks/Task.cpp
@@ -10,7 +10,7 @@
 #include "Task.h"
 #include "TaskListener.h"
 
-void Task::SetTaskListener(TaskListener * listener)
+void Task::AddTaskListener(TaskListener * listener)
 {
 	this->listener = listener;
 }
@@ -37,6 +37,11 @@ std::string Task::GetStatus()
 	return status;
 }
 
+std::string Task::GetError()
+{
+	return error;
+}
+
 bool Task::GetDone()
 {
 	return done;
@@ -44,38 +49,50 @@ bool Task::GetDone()
 
 void Task::Poll()
 {
-	int newProgress;
-	bool newDone = false;
-	std::string newStatus;
-	pthread_mutex_lock(&taskMutex);
-	newProgress = thProgress;
-	newDone = thDone;
-	newStatus = std::string(thStatus);
-	pthread_mutex_unlock(&taskMutex);
-
-	if(newProgress!=progress) {
-		progress = newProgress;
-		if(listener)
-			listener->NotifyProgress(this);
-	}
-	if(newStatus!=status) {
-		status = std::string(newStatus);
-		if(listener)
-			listener->NotifyStatus(this);
-	}
-
-	if(done)
+	if(!done)
 	{
-		pthread_join(doWorkThread, NULL);
-		pthread_mutex_destroy(&taskMutex);
-		after();
-	}
+		int newProgress;
+		bool newDone = false;
+		std::string newStatus;
+		std::string newError;
+		pthread_mutex_lock(&taskMutex);
+		newProgress = thProgress;
+		newDone = thDone;
+		newStatus = std::string(thStatus);
+		newError = std::string(thError);
+		pthread_mutex_unlock(&taskMutex);
 
-	if(newDone!=done)
-	{
-		done = newDone;
-		if(listener)
-			listener->NotifyDone(this);
+		if(newProgress!=progress) {
+			progress = newProgress;
+			if(listener)
+				listener->NotifyProgress(this);
+		}
+
+		if(newError!=error) {
+			error = std::string(newError);
+			if(listener)
+				listener->NotifyError(this);
+		}
+
+		if(newStatus!=status) {
+			status = std::string(newStatus);
+			if(listener)
+				listener->NotifyStatus(this);
+		}
+
+		if(done)
+		{
+			pthread_join(doWorkThread, NULL);
+			pthread_mutex_destroy(&taskMutex);
+			after();
+		}
+
+		if(newDone!=done)
+		{
+			done = newDone;
+			if(listener)
+				listener->NotifyDone(this);
+		}
 	}
 }
 
@@ -131,3 +148,10 @@ void Task::notifyDone()
 	thDone = true;
 	pthread_mutex_unlock(&taskMutex);
 }
+
+void Task::notifyError(std::string error)
+{
+	pthread_mutex_lock(&taskMutex);
+	thError = std::string(error);
+	pthread_mutex_unlock(&taskMutex);
+}
diff --git a/src/tasks/Task.h b/src/tasks/Task.h
index 10a8b905f..ae83e1ddb 100644
--- a/src/tasks/Task.h
+++ b/src/tasks/Task.h
@@ -15,10 +15,11 @@
 class TaskListener;
 class Task {
 public:
-	void SetTaskListener(TaskListener * listener);
+	void AddTaskListener(TaskListener * listener);
 	void Start();
 	int GetProgress();
 	bool GetDone();
+	std::string GetError();
 	std::string GetStatus();
 	void Poll();
 	Task() {}
@@ -27,10 +28,12 @@ protected:
 	int progress;
 	bool done;
 	std::string status;
+	std::string error;
 
 	int thProgress;
 	bool thDone;
 	std::string thStatus;
+	std::string thError;
 
 	TaskListener * listener;
 	pthread_t doWorkThread;
@@ -43,9 +46,10 @@ protected:
 	virtual void doWork();
 	static void * doWork_helper(void * ref);
 
-	void notifyProgress(int progress);
-	void notifyStatus(std::string status);
-	void notifyDone();
+	virtual void notifyProgress(int progress);
+	virtual void notifyError(std::string error);
+	virtual void notifyStatus(std::string status);
+	virtual void notifyDone();
 };
 
 #endif /* TASK_H_ */
diff --git a/src/tasks/TaskListener.h b/src/tasks/TaskListener.h
index fc5d5e7ae..7405c03ee 100644
--- a/src/tasks/TaskListener.h
+++ b/src/tasks/TaskListener.h
@@ -12,6 +12,7 @@ class Task;
 class TaskListener {
 public:
 	virtual void NotifyDone(Task * task) {}
+	virtual void NotifyError(Task * task) {}
 	virtual void NotifyProgress(Task * task) {}
 	virtual void NotifyStatus(Task * task) {}
 	virtual ~TaskListener() {}
diff --git a/src/tasks/TaskWindow.cpp b/src/tasks/TaskWindow.cpp
index c705d36ec..910e11a52 100644
--- a/src/tasks/TaskWindow.cpp
+++ b/src/tasks/TaskWindow.cpp
@@ -5,28 +5,37 @@
  *      Author: Simon
  */
 
+#include <sstream>
 #include "interface/Label.h"
 #include "TaskWindow.h"
+#include "dialogues/ErrorMessage.h"
+#include "Style.h"
 #include "Task.h"
 
 TaskWindow::TaskWindow(std::string title_, Task * task_, bool closeOnDone):
 	task(task_),
 	title(title_),
-	ui::Window(ui::Point(-1, -1), ui::Point(300, 200)),
+	ui::Window(ui::Point(-1, -1), ui::Point(240, 60)),
 	progress(0),
 	done(false),
-	closeOnDone(closeOnDone)
+	closeOnDone(closeOnDone),
+	progressStatus("0%")
 {
 
-	ui::Label * tempLabel = new ui::Label(ui::Point(3, 3), ui::Point(Size.X-6, 16), title);
+	ui::Label * tempLabel = new ui::Label(ui::Point(4, 5), ui::Point(Size.X-8, 15), title);
+	tempLabel->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
+	tempLabel->Appearance.VerticalAlign = ui::Appearance::AlignMiddle;
+	tempLabel->SetTextColour(style::Colour::WarningTitle);
 	AddComponent(tempLabel);
 
-	statusLabel = new ui::Label(ui::Point(3, 19), ui::Point(Size.X-6, 16), "");
+	statusLabel = new ui::Label(ui::Point(4, 23), ui::Point(Size.X-8, 15), "");
+	statusLabel->Appearance.HorizontalAlign = ui::Appearance::AlignLeft;
+	statusLabel->Appearance.VerticalAlign = ui::Appearance::AlignMiddle;
 	AddComponent(statusLabel);
 
 	ui::Engine::Ref().ShowWindow(this);
 
-	task->SetTaskListener(this);
+	task->AddTaskListener(this);
 	task->Start();
 }
 
@@ -35,6 +44,11 @@ void TaskWindow::NotifyStatus(Task * task)
 	statusLabel->SetText(task->GetStatus());
 }
 
+void TaskWindow::NotifyError(Task * task)
+{
+	new ErrorMessage("Error", task->GetError());
+}
+
 void TaskWindow::NotifyDone(Task * task)
 {
 	if(closeOnDone)
@@ -53,6 +67,16 @@ void TaskWindow::Exit()
 void TaskWindow::NotifyProgress(Task * task)
 {
 	progress = task->GetProgress();
+	std::stringstream pStream;
+	if(progress>-1)
+	{
+		pStream << progress << "%";
+	}
+	else
+	{
+		pStream << "Please wait...";
+	}
+	progressStatus = pStream.str();
 }
 
 void TaskWindow::OnTick(float dt)
@@ -69,26 +93,32 @@ void TaskWindow::OnDraw()
 	g->clearrect(Position.X-2, Position.Y-2, Size.X+3, Size.Y+3);
 	g->drawrect(Position.X, Position.Y, Size.X, Size.Y, 255, 255, 255, 255);
 
-	g->drawrect(Position.X + 20, Position.Y + 36, Size.X-40, 24, 255, 255, 255, 255);
+	g->draw_line(Position.X, Position.Y + Size.Y-17, Position.X + Size.X - 1, Position.Y + Size.Y-17, 255, 255, 255, 255);
+
+	ui::Colour progressBarColour = style::Colour::WarningTitle;
 
 	if(progress!=-1)
 	{
-		float size = float(Size.X-40)*(float(progress)/100.0f); // TIL...
-		g->fillrect(Position.X + 20, Position.Y + 36, size, 24, 255, 255, 255, 255);
+		float size = float(Size.X-4)*(float(progress)/100.0f); // TIL...
+		g->fillrect(Position.X + 2, Position.Y + Size.Y-15, size, 13, progressBarColour.Red, progressBarColour.Green, progressBarColour.Blue, 255);
 	} else {
 		int size = 40, rsize = 0;
-		float position = float(Size.X-40)*(intermediatePos/100.0f);
-		if(position + size > Size.X-40)
+		float position = float(Size.X-4)*(intermediatePos/100.0f);
+		if(position + size - 1 > Size.X-4)
 		{
-			size = (Size.X-40)-position;
+			size = (Size.X-4)-position+1;
 			rsize = 40-size;
 		}
-		g->fillrect(Position.X + 20 + position, Position.Y + 36, size, 24, 255, 255, 255, 255);
+		g->fillrect(Position.X + 2 + position, Position.Y + Size.Y-15, size, 13, progressBarColour.Red, progressBarColour.Green, progressBarColour.Blue, 255);
 		if(rsize)
 		{
-			g->fillrect(Position.X + 20, Position.Y + 36, rsize, 24, 255, 255, 255, 255);
+			g->fillrect(Position.X + 2, Position.Y + Size.Y-15, rsize, 13, progressBarColour.Red, progressBarColour.Green, progressBarColour.Blue, 255);
 		}
 	}
+	if(progress<50)
+		g->drawtext(Position.X + ((Size.X-Graphics::textwidth(progressStatus.c_str()))/2), Position.Y + Size.Y-13, progressStatus, 255, 255, 255, 255);
+	else
+		g->drawtext(Position.X + ((Size.X-Graphics::textwidth(progressStatus.c_str()))/2), Position.Y + Size.Y-13, progressStatus, 0, 0, 0, 255);
 }
 
 TaskWindow::~TaskWindow() {
diff --git a/src/tasks/TaskWindow.h b/src/tasks/TaskWindow.h
index 09893bc9b..820265c63 100644
--- a/src/tasks/TaskWindow.h
+++ b/src/tasks/TaskWindow.h
@@ -22,11 +22,13 @@ class TaskWindow: public ui::Window, public TaskListener {
 	bool done;
 	bool closeOnDone;
 	ui::Label * statusLabel;
+	std::string progressStatus;
 public:
 	TaskWindow(std::string title_, Task * task_, bool closeOnDone = true);
 	virtual void NotifyStatus(Task * task);
 	virtual void NotifyDone(Task * task);
 	virtual void NotifyProgress(Task * task);
+	virtual void NotifyError(Task * task);
 	virtual void OnTick(float dt);
 	virtual void OnDraw();
 	virtual void Exit();
diff --git a/src/update/UpdateActivity.cpp b/src/update/UpdateActivity.cpp
index 607204565..a8fb7fc79 100644
--- a/src/update/UpdateActivity.cpp
+++ b/src/update/UpdateActivity.cpp
@@ -5,21 +5,148 @@
  *      Author: Simon
  */
 
+#include <bzlib.h>
+#include <sstream>
+#include "interface/Engine.h"
 #include "UpdateActivity.h"
 #include "tasks/Task.h"
+#include "client/HTTP.h"
+#include "Update.h"
+
 
 class UpdateDownloadTask : public Task
 {
-	UpdateDownloadTask() {};
-	/*virtual void doWork()
+public:
+	UpdateDownloadTask(std::string updateName, UpdateActivity * a) : updateName(updateName), a(a) {};
+private:
+	UpdateActivity * a;
+	std::string updateName;
+	virtual void notifyDone()
 	{
-		while(1)
-	}*/
+		a->NotifyDone(this);
+	}
+	virtual void doWork()
+	{
+		std::stringstream errorStream;
+		void * request = http_async_req_start(NULL, (char*)updateName.c_str(), NULL, 0, 0);
+		notifyStatus("Downloading update");
+		notifyProgress(-1);
+		while(!http_async_req_status(request))
+		{
+			int total, done;
+			http_async_get_length(request, &total, &done);
+			notifyProgress((float(done)/float(total))*100.0f);
+		}
+
+		char * data;
+		int dataLength, status;
+		data = http_async_req_stop(request, &status, &dataLength);
+		if (status!=200)
+		{
+			if (data)
+				free(data);
+			errorStream << "Server responded with Status " << status;
+			notifyError("Could not download update");
+			return;
+		}
+		if (!data)
+		{
+			errorStream << "Server responded with nothing";
+			notifyError("Server did not return any data");
+			return;
+		}
+
+		notifyStatus("Unpacking update");
+		notifyProgress(-1);
+
+		int uncompressedLength;
+
+		if(dataLength<16)
+		{
+			errorStream << "Unsufficient data, got " << dataLength << " bytes";
+			goto corrupt;
+		}
+		if (data[0]!=0x42 || data[1]!=0x75 || data[2]!=0x54 || data[3]!=0x54)
+		{
+			errorStream << "Invalid update format";
+			goto corrupt;
+		}
+
+		uncompressedLength  = (unsigned char)data[4];
+		uncompressedLength |= ((unsigned char)data[5])<<8;
+		uncompressedLength |= ((unsigned char)data[6])<<16;
+		uncompressedLength |= ((unsigned char)data[7])<<24;
+
+		char * res;
+		res = (char *)malloc(uncompressedLength);
+		if (!res)
+		{
+			errorStream << "Unable to allocate " << uncompressedLength << " bytes of memory for decompression";
+			goto corrupt;
+		}
+
+		int dstate;
+		dstate = BZ2_bzBuffToBuffDecompress((char *)res, (unsigned *)&uncompressedLength, (char *)(data+8), dataLength-8, 0, 0);
+		if (dstate)
+		{
+			errorStream << "Unable to decompress update: " << dstate;
+			free(res);
+			goto corrupt;
+		}
+
+		free(data);
+
+		notifyStatus("Applying update");
+		notifyProgress(-1);
+
+		if (update_start(res, uncompressedLength))
+		{
+			update_cleanup();
+			notifyError("Update failed - try downloading a new version.");
+		}
+
+		return;
+
+	corrupt:
+		notifyError("Downloaded update is corrupted\n" + errorStream.str());
+		free(data);
+		return;
+	}
 };
 
 UpdateActivity::UpdateActivity() {
-	// TODO Auto-generated constructor stub
+	char my_uri[] = "http://" SERVER "/Update.api?Action=Download&Architecture="
+	#if defined WIN32
+	                "Windows32"
+	#elif defined LIN32
+	                "Linux32"
+	#elif defined LIN64
+	                "Linux64"
+	#elif defined MACOSX
+	                "MacOSX"
+	#else
+	                "Unknown"
+	#endif
+	                "&InstructionSet="
+	#if defined X86_SSE3
+	                "SSE3"
+	#elif defined X86_SSE2
+	                "SSE2"
+	#elif defined X86_SSE
+	                "SSE"
+	#else
+	                "SSE"
+	#endif
+	                ;
+	updateDownloadTask = new UpdateDownloadTask(my_uri, this);
+	updateWindow = new TaskWindow("Downloading update...", updateDownloadTask, true);
+}
 
+void UpdateActivity::NotifyDone(Task * sender)
+{
+	updateWindow->Exit();
+	ui::Engine::Ref().Exit();
+	delete this;
 }
 
 UpdateActivity::~UpdateActivity() {
diff --git a/src/update/UpdateActivity.h b/src/update/UpdateActivity.h
index 6865fdfe0..1f3da7375 100644
--- a/src/update/UpdateActivity.h
+++ b/src/update/UpdateActivity.h
@@ -17,6 +17,7 @@ class UpdateActivity {
 public:
 	UpdateActivity();
 	virtual ~UpdateActivity();
+	virtual void NotifyDone(Task * sender);
 };
 
 #endif /* UPDATEACTIVITY_H_ */