diff --git a/kdecore/tests/kdebug_unittest.cpp b/kdecore/tests/kdebug_unittest.cpp
index 54992cb7..bfb36817 100644
--- a/kdecore/tests/kdebug_unittest.cpp
+++ b/kdecore/tests/kdebug_unittest.cpp
@@ -23,8 +23,8 @@
 #include <kconfiggroup.h>
 #include <qtest_kde.h>
 #include <kdebug.h>
-#include <kprocess.h>
 #include <kstandarddirs.h>
+#include <qprocess.h>
 #include "moc_kdebug_unittest.cpp"
 
 QTEST_KDEMAIN_CORE( KDebugTest )
@@ -262,15 +262,14 @@ void KDebugTest::testHasNullOutput()
 void KDebugTest::testNoMainComponentData()
 {
     // This test runs kdebug_qcoreapptest and checks its output
-    KProcess proc;
-    proc.setEnv("KDE_DEBUG_NOPROCESSINFO", "1");
-    proc.setEnv("KDE_DEBUG_TIMESTAMP", "0");
-    proc.setOutputChannelMode(KProcess::OnlyStderrChannel);
+    QProcess proc;
+    QProcessEnvironment procenv = QProcessEnvironment::systemEnvironment();
+    procenv.insert("KDE_DEBUG_NOPROCESSINFO", "1");
+    procenv.insert("KDE_DEBUG_TIMESTAMP", "0");
+    proc.setProcessEnvironment(procenv);
+    proc.setProcessChannelMode(QProcess::OnlyStderrChannel);
     QVERIFY(QFile::exists(KDEBINDIR "/kdecore-kdebug_qcoreapptest"));
-    proc << KDEBINDIR "/kdecore-kdebug_qcoreapptest";
-    //     kDebug() << proc.args();
-    const int ok = proc.execute();
-    QVERIFY(ok == 0);
+    QVERIFY(proc.execute(KDEBINDIR "/kdecore-kdebug_qcoreapptest"));
     const QByteArray allOutput = proc.readAllStandardError();
     const QList<QByteArray> receivedLines = allOutput.split('\n');
     //qDebug() << receivedLines;
diff --git a/kdecore/tests/kmimetypetest.cpp b/kdecore/tests/kmimetypetest.cpp
index 4e7ed98e..2477e7ce 100644
--- a/kdecore/tests/kmimetypetest.cpp
+++ b/kdecore/tests/kmimetypetest.cpp
@@ -23,7 +23,6 @@
 #include <config.h>
 #include <kdefakes.h>
 #include <kde_file.h>
-#include <kprocess.h>
 #include <kmimetype.h>
 #include <ksycoca.h>
 #include <kglobal.h>
@@ -44,6 +43,7 @@
 #include <QtCore/qbuffer.h>
 #include <QtCore/qfuture.h>
 #include <QtCore/qtconcurrentrun.h>
+#include <QtCore/qprocess.h>
 
 void KMimeTypeTest::initTestCase()
 {
@@ -155,11 +155,9 @@ void KMimeTypeTest::cleanupTestCase()
     QFile::remove(fakePlugin);
     QFile::remove(m_kdeApp);
     QFile::remove(m_nonKdeApp);
-    //QProcess::execute( KGlobal::dirs()->findExe(KBUILDSYCOCA_EXENAME) );
-    KProcess proc;
-    proc << KStandardDirs::findExe(KBUILDSYCOCA_EXENAME);
-    proc.setOutputChannelMode(KProcess::MergedChannels); // silence kbuildsycoca output
-    proc.execute();
+    QProcess proc;
+    proc.setOutputChannelMode(QProcess::MergedChannels); // silence kbuildsycoca output
+    proc.execute(KStandardDirs::findExe(KBUILDSYCOCA_EXENAME));
 }
 
 static void checkIcon( const KUrl& url, const QString& expectedIcon )
diff --git a/kdecore/tests/kservicetest.cpp b/kdecore/tests/kservicetest.cpp
index efbfe325..d89dd578 100644
--- a/kdecore/tests/kservicetest.cpp
+++ b/kdecore/tests/kservicetest.cpp
@@ -31,7 +31,6 @@
 
 #include <kprotocolinfo.h>
 #include <kdebug.h>
-#include <kprocess.h>
 #include <kservicegroup.h>
 #include <kservicetypetrader.h>
 #include <kservicetype.h>
@@ -129,11 +128,9 @@ void KServiceTest::cleanupTestCase()
         const QString fakeService = KStandardDirs::locateLocal("services", service);
         QFile::remove(fakeService);
     }
-    //QProcess::execute( KGlobal::dirs()->findExe(KBUILDSYCOCA_EXENAME) );
-    KProcess proc;
-    proc << KStandardDirs::findExe(KBUILDSYCOCA_EXENAME);
-    proc.setOutputChannelMode(KProcess::MergedChannels); // silence kbuildsycoca output
-    proc.execute();
+    QProcess proc;
+    proc.setOutputChannelMode(QProcess::MergedChannels); // silence kbuildsycoca output
+    proc.execute(KStandardDirs::findExe(KBUILDSYCOCA_EXENAME));
 }
 
 void KServiceTest::testByName()
diff --git a/kded/tests/kmimeassociationstest.cpp b/kded/tests/kmimeassociationstest.cpp
index 342a8fdc..69fee42a 100644
--- a/kded/tests/kmimeassociationstest.cpp
+++ b/kded/tests/kmimeassociationstest.cpp
@@ -18,7 +18,7 @@
     Boston, MA 02110-1301, USA.
 */
 
-#include <kprocess.h>
+#include <QProcess>
 #include <kconfiggroup.h>
 #include <kdesktopfile.h>
 #include <kmimetypetrader.h>
@@ -432,12 +432,11 @@ private:
         // (The real KCM code simply does the refresh in a slot, asynchronously)
         QEventLoop loop;
         QObject::connect(KSycoca::self(), SIGNAL(databaseChanged(QStringList)), &loop, SLOT(quit()));
-        KProcess proc;
+        QProcess proc;
         const QString kbuildsycoca = KStandardDirs::findExe(KBUILDSYCOCA_EXENAME);
         QVERIFY(!kbuildsycoca.isEmpty());
-        proc << kbuildsycoca;
-        proc.setOutputChannelMode(KProcess::MergedChannels); // silence kbuildsycoca output
-        proc.execute();
+        proc.setProcessChannelMode(QProcess::MergedChannels); // silence kbuildsycoca output
+        proc.execute(kbuildsycoca);
         loop.exec();
     }
 
diff --git a/kdeui/dialogs/kedittoolbar.cpp b/kdeui/dialogs/kedittoolbar.cpp
index a959d9f1..b2ff6451 100644
--- a/kdeui/dialogs/kedittoolbar.cpp
+++ b/kdeui/dialogs/kedittoolbar.cpp
@@ -23,16 +23,17 @@
 
 
 #include <QtXml/qdom.h>
-#include <QtGui/QLayout>
 #include <QtCore/QDir>
 #include <QtCore/QFile>
-#include <QHeaderView>
+#include <QtCore/QProcess>
+#include <QtCore/QMimeData>
+#include <QtGui/QHeaderView>
 #include <QtGui/QToolButton>
 #include <QtGui/QLabel>
 #include <QtGui/QApplication>
 #include <QtGui/QGridLayout>
 #include <QtGui/QCheckBox>
-#include <QMimeData>
+#include <QtGui/QLayout>
 
 #include <kstandarddirs.h>
 #include <klistwidgetsearchline.h>
@@ -46,7 +47,6 @@
 #include <kconfig.h>
 #include <kdebug.h>
 #include <kpushbutton.h>
-#include <kprocess.h>
 #include <ktoolbar.h>
 #include <kdeversion.h>
 #include <kcombobox.h>
@@ -486,7 +486,7 @@ public:
     QLabel * m_helpArea;
     KPushButton* m_changeIcon;
     KPushButton* m_changeIconText;
-    KProcess* m_kdialogProcess;
+    QProcess* m_kdialogProcess;
     bool m_isPart : 1;
     bool m_hasKDialog : 1;
     bool m_loadedOnce : 1;
@@ -1522,19 +1522,18 @@ void KEditToolBarWidgetPrivate::slotChangeIcon()
   m_currentXmlData->dump();
   Q_ASSERT( m_currentXmlData->type() != XmlData::Merged );
 
-  m_kdialogProcess = new KProcess;
+  m_kdialogProcess = new QProcess();
   QString kdialogExe = KStandardDirs::findExe(QLatin1String("kdialog"));
-  (*m_kdialogProcess) << kdialogExe;
-  (*m_kdialogProcess) << "--caption";
-  (*m_kdialogProcess) << i18n( "Change Icon" );
-  (*m_kdialogProcess) << "--embed";
-  (*m_kdialogProcess) << QString::number( (quintptr)m_widget->window()->winId() );
-  (*m_kdialogProcess) << "--geticon";
-  (*m_kdialogProcess) << "Toolbar";
-  (*m_kdialogProcess) << "Actions";
-  m_kdialogProcess->setOutputChannelMode(KProcess::OnlyStdoutChannel);
-  m_kdialogProcess->setNextOpenMode( QIODevice::ReadOnly | QIODevice::Text );
-  m_kdialogProcess->start();
+  QStringList kdialogArgs;
+  kdialogArgs << "--caption";
+  kdialogArgs << i18n( "Change Icon" );
+  kdialogArgs << "--embed";
+  kdialogArgs << QString::number( (quintptr)m_widget->window()->winId() );
+  kdialogArgs << "--geticon";
+  kdialogArgs << "Toolbar";
+  kdialogArgs << "Actions";
+  m_kdialogProcess->setReadChannel(QProcess::StandardOutput);
+  m_kdialogProcess->start(kdialogExe, kdialogArgs);
   if ( !m_kdialogProcess->waitForStarted() ) {
     kError(240) << "Can't run " << kdialogExe << endl;
     delete m_kdialogProcess;
diff --git a/kdeui/tests/kglobalsettingstest.cpp b/kdeui/tests/kglobalsettingstest.cpp
index ec9e2c1c..83ea9e81 100644
--- a/kdeui/tests/kglobalsettingstest.cpp
+++ b/kdeui/tests/kglobalsettingstest.cpp
@@ -25,7 +25,7 @@ QTEST_KDEMAIN( KGlobalSettingsTest, GUI )
 
 #include <kglobalsettings.h>
 #include <kdebug.h>
-#include <kprocess.h>
+#include <QtCore/QProcess>
 #include <QtCore/QEventLoop>
 #include <QtDBus/QtDBus>
 
@@ -36,7 +36,6 @@ QTEST_KDEMAIN( KGlobalSettingsTest, GUI )
  * and we check that the corresponding signals are emitted, i.e. that our process
  * got the dbus signal.
  *
- * As a nice side-effect we automatically test a bit of KProcess as well :)
  */
 
 void KGlobalSettingsTest::initTestCase()
@@ -62,13 +61,9 @@ void KGlobalSettingsTest::initTestCase()
     QSignalSpy appearance_spy( settings, SIGNAL(appearanceChanged()) )
 
 static void callClient( const QString& opt, const char* signalToWaitFor ) {
-    KProcess proc;
+    QProcess proc;
     QVERIFY(QFile::exists("./kdeui-kglobalsettingsclient"));
-    proc << "./kdeui-kglobalsettingsclient";
-    proc << opt;
-//     kDebug() << proc.args();
-    int ok = proc.execute();
-    QVERIFY(ok == 0);
+    QVERIFY(proc.execute("./kdeui-kglobalsettingsclient", QStringList(opt)));
 
     QVERIFY(QTest::kWaitForSignal(KGlobalSettings::self(), signalToWaitFor, 5000));
 }
diff --git a/kdeui/tests/kuniqueapptest.cpp b/kdeui/tests/kuniqueapptest.cpp
index 17042a65..dc9e2ed6 100644
--- a/kdeui/tests/kuniqueapptest.cpp
+++ b/kdeui/tests/kuniqueapptest.cpp
@@ -24,10 +24,10 @@
 #include <kcmdlineargs.h>
 #include <kaboutdata.h>
 #include <kdebug.h>
-#include <kprocess.h>
 
 #include <QTimer>
 #include <QFile>
+#include <QProcess>
 
 class TestApp : public KUniqueApplication
 {
@@ -40,11 +40,10 @@ public:
 private Q_SLOTS:
     void executeNewChild() {
         // Duplicated from kglobalsettingstest.cpp - make a shared helper method?
-        KProcess* proc = new KProcess(this);
+        QProcess* proc = new QProcess(this);
         const QString appName = "kdeui-kuniqueapptest";
         Q_ASSERT(QFile::exists(appName));
-        (*proc) << "./" + appName;
-        proc->start();
+        proc->start("./" + appName);
     }
 private:
     int m_callCount;
diff --git a/kinit/klauncher.h b/kinit/klauncher.h
index 58be147a..f14d19a6 100644
--- a/kinit/klauncher.h
+++ b/kinit/klauncher.h
@@ -37,7 +37,6 @@
 #include <QtDBus/QDBusConnectionInterface>
 
 #include <kservice.h>
-#include <kprocess.h>
 #include <kurl.h>
 #include <kio/connection.h>
 
diff --git a/kio/kfile/kfilemetadataprovider_p.h b/kio/kfile/kfilemetadataprovider_p.h
index 2a1018ea..50522e12 100644
--- a/kio/kfile/kfilemetadataprovider_p.h
+++ b/kio/kfile/kfilemetadataprovider_p.h
@@ -29,7 +29,6 @@
 #include <config-kio.h>
 
 class KFileItemList;
-class KProcess;
 class KUrl;
 class QWidget;
 
diff --git a/kio/kfile/kfilesharedialog.cpp b/kio/kfile/kfilesharedialog.cpp
index 14cf22b5..eea785ec 100644
--- a/kio/kfile/kfilesharedialog.cpp
+++ b/kio/kfile/kfilesharedialog.cpp
@@ -18,26 +18,26 @@
 */
 
 #include "kfilesharedialog.h"
-#include <kvbox.h>
-#include <QtGui/QLabel>
 #include <QtCore/QDir>
+#include <QtCore/QProcess>
+#include <QtGui/QLabel>
 #include <QtGui/QRadioButton>
 #include <QtGui/QButtonGroup>
 #include <QtGui/QLayout>
+#include <QtGui/QPushButton>
 #include <klocale.h>
 #include <kstandarddirs.h>
-#include <kprocess.h>
 #include <kdebug.h>
 #include <kio/kfileshare.h>
 #include <kseparator.h>
-#include <QtGui/QPushButton>
 #include <kmessagebox.h>
+#include <kvbox.h>
 
 class KFileSharePropsPlugin::Private
 {
 public:
     KVBox *m_vBox;
-    KProcess *m_configProc;
+    QProcess *m_configProc;
     bool m_bAllShared;
     bool m_bAllUnshared;
     QWidget *m_widget;
@@ -198,9 +198,8 @@ void KFileSharePropsPlugin::slotConfigureFileSharing()
 {
     if (d->m_configProc) return;
 
-    d->m_configProc = new KProcess(this);
-    (*d->m_configProc) << KStandardDirs::findExe("kdesu") << "kcmshell4" << "fileshare";
-    if (!d->m_configProc->startDetached())
+    d->m_configProc = new QProcess(this);
+    if (!d->m_configProc->startDetached(KStandardDirs::findExe("kdesu"), QStringList() << "kcmshell4" << "fileshare"))
     {
        delete d->m_configProc;
        d->m_configProc = 0;
diff --git a/kio/kio/kbuildsycocaprogressdialog.cpp b/kio/kio/kbuildsycocaprogressdialog.cpp
index 949fe0fc..f0f263e0 100644
--- a/kio/kio/kbuildsycocaprogressdialog.cpp
+++ b/kio/kio/kbuildsycocaprogressdialog.cpp
@@ -17,10 +17,10 @@
 */
 #include "kbuildsycocaprogressdialog.h"
 #include <ksycoca.h>
-#include <kprocess.h>
 #include <kstandarddirs.h>
 #include <klocale.h>
-#include <QtDBus/QtDBus>
+#include <QtCore/QProcess>
+#include <QtDBus/QDBusInterface>
 
 class KBuildSycocaProgressDialogPrivate
 {
@@ -51,9 +51,8 @@ void KBuildSycocaProgressDialog::rebuildKSycoca(QWidget *parent)
   } else {
       // kded not running, e.g. when using keditfiletype out of a KDE session
       QObject::connect(KSycoca::self(), SIGNAL(databaseChanged(QStringList)), &dlg, SLOT(_k_slotFinished()));
-      KProcess* proc = new KProcess(&dlg);
-      (*proc) << KStandardDirs::findExe(KBUILDSYCOCA_EXENAME);
-      proc->start();
+      QProcess* proc = new QProcess(&dlg);
+      proc->start(KStandardDirs::findExe(KBUILDSYCOCA_EXENAME));
   }
   dlg.exec();
 }
diff --git a/kio/kio/ksambashare.cpp b/kio/kio/ksambashare.cpp
index c776d1f7..47f5815f 100644
--- a/kio/kio/ksambashare.cpp
+++ b/kio/kio/ksambashare.cpp
@@ -29,11 +29,11 @@
 #include <QtCore/QFileInfo>
 #include <QtCore/QTextStream>
 #include <QtCore/QStringList>
+#include <QtCore/QProcess>
 
 #include <kdirwatch.h>
 #include <kdebug.h>
 #include <kglobal.h>
-#include <kprocess.h>
 #include <kuser.h>
 #include <kstandarddirs.h>
 
@@ -110,11 +110,9 @@ void KSambaSharePrivate::setUserSharePath()
 int KSambaSharePrivate::runProcess(const QString &progName, const QStringList &args,
                                    QByteArray &stdOut, QByteArray &stdErr)
 {
-    KProcess process;
-
-    process.setProgram(progName, args);
-    process.setOutputChannelMode(KProcess::SeparateChannels);
-    process.start();
+    QProcess process;
+    process.setProcessChannelMode(QProcess::SeparateChannels);
+    process.start(progName, args);
     //TODO: make it async in future
     process.waitForFinished();
 
@@ -361,7 +359,7 @@ KSambaShareData::UserShareError KSambaSharePrivate::remove(const KSambaShareData
 
     args << QLatin1String("usershare") << QLatin1String("delete") << shareData.name();
 
-    int result = KProcess::execute(QLatin1String("net"), args);
+    int result = QProcess::execute(QLatin1String("net"), args);
     return (result == 0) ? KSambaShareData::UserShareOk : KSambaShareData::UserShareSystemError;
 }
 
diff --git a/kio/misc/kpac/discovery.cpp b/kio/misc/kpac/discovery.cpp
index 405d50fd..40191083 100644
--- a/kio/misc/kpac/discovery.cpp
+++ b/kio/misc/kpac/discovery.cpp
@@ -46,25 +46,24 @@
 #include <sys/utsname.h>
 
 #include <QtCore/QTimer>
+#include <QtCore/QProcess>
 #include <QtNetwork/QHostInfo>
 
 #include <klocale.h>
 #include <kurl.h>
 #include <kstandarddirs.h>
-#include <kprocess.h>
 #include "moc_discovery.cpp"
 
 namespace KPAC
 {
     Discovery::Discovery( QObject* parent )
         : Downloader( parent ),
-          m_helper( new KProcess(this) )
+          m_helper( new QProcess(this) )
     {
-        m_helper->setOutputChannelMode(KProcess::SeparateChannels);
+        m_helper->setProcessChannelMode(QProcess::SeparateChannels);
         connect( m_helper, SIGNAL(readyReadStandardOutput()), SLOT(helperOutput()) );
         connect( m_helper, SIGNAL(finished(int,QProcess::ExitStatus)), SLOT(failed()) );
-        *m_helper << KStandardDirs::findExe("kpac_dhcp_helper");
-        m_helper->start();
+        m_helper->start(KStandardDirs::findExe("kpac_dhcp_helper"));
         if ( !m_helper->waitForStarted() )
             QTimer::singleShot( 0, this, SLOT(failed()) );
     }
diff --git a/kio/misc/kpac/discovery.h b/kio/misc/kpac/discovery.h
index 85b438ac..208c1bac 100644
--- a/kio/misc/kpac/discovery.h
+++ b/kio/misc/kpac/discovery.h
@@ -23,7 +23,7 @@
 
 #include "downloader.h"
 
-class KProcess;
+class QProcess;
 
 namespace KPAC
 {
@@ -43,7 +43,7 @@ namespace KPAC
         bool initDomainName();
         bool checkDomain() const;
 
-        KProcess* m_helper;
+        QProcess* m_helper;
         QString m_domainName;
     };
 }
diff --git a/kio/tests/kdcopcheck.cpp b/kio/tests/kdcopcheck.cpp
index a607fef4..586de0c2 100644
--- a/kio/tests/kdcopcheck.cpp
+++ b/kio/tests/kdcopcheck.cpp
@@ -5,7 +5,7 @@
 #include <kstandarddirs.h>
 #include <kservicegroup.h>
 #include <kprotocolinfo.h>
-#include <kprocess.h>
+#include <QtCore/QProcess>
 #include <QtCore/QTimer>
 #include <kcmdlineargs.h>
 #include "kdcopcheck.h"
@@ -34,9 +34,8 @@ void debug(const char *format, const char *txt)
 TestService::TestService(const QString &exec)
 {
    m_exec = exec;
-   proc << exec;
 
-   proc.start();
+   proc.start(exec);
 
    connect(KApplication::dcopClient(), SIGNAL(applicationRegistered(QByteArray)),
            this, SLOT(newApp(QByteArray)));
diff --git a/kio/tests/kdcopcheck.h b/kio/tests/kdcopcheck.h
index 4f961bb7..ffe9c5c1 100644
--- a/kio/tests/kdcopcheck.h
+++ b/kio/tests/kdcopcheck.h
@@ -21,7 +21,7 @@ public Q_SLOTS:
 protected:
     int result;
     QString m_exec;
-    KProcess proc;
+    QProcess proc;
 };
 
 #endif
diff --git a/kunitconversion/currency.cpp b/kunitconversion/currency.cpp
index d61f8de3..8f0088f9 100644
--- a/kunitconversion/currency.cpp
+++ b/kunitconversion/currency.cpp
@@ -25,10 +25,10 @@
 #include <QtCore/QFileInfo>
 #include <QtCore/QDateTime>
 #include <QtCore/QMutex>
+#include <QtCore/QProcess>
 #include <QtXml/qdom.h>
 #include <kdebug.h>
 #include <klocale.h>
-#include <kprocess.h>
 #include <kstandarddirs.h>
 
 #ifndef KUNITCONVERSION_NO_SOLID
@@ -550,7 +550,7 @@ Value Currency::convert(const Value& value, UnitPtr to)
             */
             kDebug() << "Removed previous cache:" << QFile::remove(m_cache);
 #ifndef KUNITCONVERSION_NO_KIO
-            if (KProcess::execute(QStringList() << "kioclient" << "copy" << "--noninteractive" << URL << m_cache) == 0) {
+            if (QProcess::execute(QStringList() << "kioclient" << "copy" << "--noninteractive" << URL << m_cache) == 0) {
                 m_update = true;
             }
 #else
diff --git a/security/crypto/crypto.cpp b/security/crypto/crypto.cpp
index 616f68ae..b7e66bd1 100644
--- a/security/crypto/crypto.cpp
+++ b/security/crypto/crypto.cpp
@@ -58,7 +58,6 @@
 #include <kmessagebox.h>
 #include <kpassworddialog.h>
 #include <knewpassworddialog.h>
-#include <kprocess.h>
 #include <kpushbutton.h>
 #include <kseparator.h>
 #include <kstandarddirs.h>