diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -81,7 +81,28 @@
 if (WIN32)
     add_definitions(-DW7API)
     find_package(Qt5 ${QT_MIN_VERSION} REQUIRED COMPONENTS WinExtras)
-    # TODO set var for LIBS += User32.lib Ole32.lib Shell32.lib ShlWapi.lib Gdi32.lib ComCtl32.lib ?
+
+    # taken from https://stackoverflow.com/a/40217291
+    macro(get_WIN32_WINNT version)
+        if (CMAKE_SYSTEM_VERSION)
+            set(ver ${CMAKE_SYSTEM_VERSION})
+            string(REGEX MATCH "^([0-9]+).([0-9])" ver ${ver})
+            string(REGEX MATCH "^([0-9]+)" verMajor ${ver})
+            # Check for Windows 10, b/c we'll need to convert to hex 'A'.
+            if ("${verMajor}" MATCHES "10")
+                set(verMajor "A")
+                string(REGEX REPLACE "^([0-9]+)" ${verMajor} ver ${ver})
+            endif ("${verMajor}" MATCHES "10")
+            # Remove all remaining '.' characters.
+            string(REPLACE "." "" ver ${ver})
+            # Prepend each digit with a zero.
+            string(REGEX REPLACE "([0-9A-Z])" "0\\1" ver ${ver})
+            set(${version} "0x${ver}")
+        endif(CMAKE_SYSTEM_VERSION)
+    endmacro(get_WIN32_WINNT)
+
+    get_WIN32_WINNT(ver)
+    add_definitions(-D_WIN32_WINNT=${ver})
 endif()
 
 # Optional: GnomeKeyring
diff --git a/src/lib/app/datapaths.h b/src/lib/app/datapaths.h
--- a/src/lib/app/datapaths.h
+++ b/src/lib/app/datapaths.h
@@ -42,6 +42,7 @@
     };
 
     explicit DataPaths();
+    ~DataPaths();
 
     // Set absolute path of current profile
     static void setCurrentProfilePath(const QString &profilePath);
diff --git a/src/lib/app/datapaths.cpp b/src/lib/app/datapaths.cpp
--- a/src/lib/app/datapaths.cpp
+++ b/src/lib/app/datapaths.cpp
@@ -31,6 +31,10 @@
     init();
 }
 
+DataPaths::~DataPaths()
+{
+}
+
 // static
 void DataPaths::setCurrentProfilePath(const QString &profilePath)
 {
diff --git a/src/lib/downloads/downloaditem.cpp b/src/lib/downloads/downloaditem.cpp
--- a/src/lib/downloads/downloaditem.cpp
+++ b/src/lib/downloads/downloaditem.cpp
@@ -39,6 +39,7 @@
 
 #ifdef Q_OS_WIN
 #include "Shlwapi.h"
+#include "shellapi.h"
 #endif
 
 //#define DOWNMANAGER_DEBUG
diff --git a/src/lib/other/registerqappassociation.cpp b/src/lib/other/registerqappassociation.cpp
--- a/src/lib/other/registerqappassociation.cpp
+++ b/src/lib/other/registerqappassociation.cpp
@@ -273,53 +273,52 @@
         return false;
     }
 
-    if (isWin10OrNewer()) {
-        IApplicationActivationManager* pActivator;
-        HRESULT hr = CoCreateInstance(CLSID_ApplicationActivationManager,
-                                      nullptr,
-                                      CLSCTX_INPROC,
-                                      IID_IApplicationActivationManager,
-                                      (void**)&pActivator);
-
-        if (!SUCCEEDED(hr)) {
-            return false;
-        }
-
-        DWORD pid;
-        hr = pActivator->ActivateApplication(
-            L"windows.immersivecontrolpanel_cw5n1h2txyewy" // appUserModelId of "Settings"
-            L"!microsoft.windows.immersivecontrolpanel",   //  in Windows Store
-            L"page=SettingsPageAppsDefaults", AO_NONE, &pid);
-
-        if (!SUCCEEDED(hr)) {
-            return false;
-        }
+#ifdef _WIN32_WINNT_WIN8
+    IApplicationActivationManager* pActivator;
+    HRESULT hr = CoCreateInstance(CLSID_ApplicationActivationManager,
+                                  nullptr,
+                                  CLSCTX_INPROC,
+                                  IID_IApplicationActivationManager,
+                                  (void**)&pActivator);
+
+    if (!SUCCEEDED(hr)) {
+        return false;
+    }
 
-        // Do not check error because we could at least open
-        // the "Default apps" setting.
-        pActivator->ActivateApplication(
-            L"windows.immersivecontrolpanel_cw5n1h2txyewy"
-            L"!microsoft.windows.immersivecontrolpanel",
-            L"page=SettingsPageAppsDefaults"
-            L"&target=SystemSettings_DefaultApps_Browser", AO_NONE, &pid);
+    DWORD pid;
+    hr = pActivator->ActivateApplication(
+        L"windows.immersivecontrolpanel_cw5n1h2txyewy" // appUserModelId of "Settings"
+        L"!microsoft.windows.immersivecontrolpanel",   //  in Windows Store
+        L"page=SettingsPageAppsDefaults", AO_NONE, &pid);
 
-        pActivator->Release();
+    if (!SUCCEEDED(hr)) {
+        return false;
     }
-    else {
-        IApplicationAssociationRegistrationUI* pAARUI = NULL;
 
-        HRESULT hr = CoCreateInstance(CLSID_ApplicationAssociationRegistrationUI,
-                                      NULL, CLSCTX_INPROC, __uuidof(IApplicationAssociationRegistrationUI),
-                                      reinterpret_cast< void** > (&pAARUI));
+    // Do not check error because we could at least open
+    // the "Default apps" setting.
+    pActivator->ActivateApplication(
+        L"windows.immersivecontrolpanel_cw5n1h2txyewy"
+        L"!microsoft.windows.immersivecontrolpanel",
+        L"page=SettingsPageAppsDefaults"
+        L"&target=SystemSettings_DefaultApps_Browser", AO_NONE, &pid);
 
-        if (!SUCCEEDED(hr)) {
-            return false;
-        }
+    pActivator->Release();
+#else // Vista or Win7
+    IApplicationAssociationRegistrationUI* pAARUI = NULL;
+
+    HRESULT hr = CoCreateInstance(CLSID_ApplicationAssociationRegistrationUI,
+                                  NULL, CLSCTX_INPROC, __uuidof(IApplicationAssociationRegistrationUI),
+                                  reinterpret_cast< void** > (&pAARUI));
 
-        hr = pAARUI->LaunchAdvancedAssociationUI(reinterpret_cast<LPCWSTR>(_appRegisteredName.utf16()));
-        pAARUI->Release();
+    if (!SUCCEEDED(hr)) {
+        return false;
     }
 
+    hr = pAARUI->LaunchAdvancedAssociationUI(reinterpret_cast<LPCWSTR>(_appRegisteredName.utf16()));
+    pAARUI->Release();
+#endif // _WIN32_WINNT_WIN8
+
     return true;
 }