diff --git a/src/plugins/projectexplorer/kit.cpp b/src/plugins/projectexplorer/kit.cpp
index 6f233524925..3190a450a5e 100644
--- a/src/plugins/projectexplorer/kit.cpp
+++ b/src/plugins/projectexplorer/kit.cpp
@@ -31,6 +31,7 @@
 
 #include "kitmanager.h"
 #include "ioutputparser.h"
+#include "osparser.h"
 
 #include <QApplication>
 #include <QFileInfo>
@@ -399,15 +400,10 @@ void Kit::addToEnvironment(Utils::Environment &env) const
 
 IOutputParser *Kit::createOutputParser() const
 {
-    IOutputParser *first = 0;
+    IOutputParser *first = new OsParser;
     QList<KitInformation *> infoList = KitManager::kitInformation();
-    foreach (KitInformation *ki, infoList) {
-        IOutputParser *next = ki->createOutputParser(this);
-        if (!first)
-            first = next;
-        else
-            first->appendOutputParser(next);
-    }
+    foreach (KitInformation *ki, infoList)
+        first->appendOutputParser(ki->createOutputParser(this));
     return first;
 }
 
diff --git a/src/plugins/projectexplorer/osparser.cpp b/src/plugins/projectexplorer/osparser.cpp
new file mode 100644
index 00000000000..3747b6dd766
--- /dev/null
+++ b/src/plugins/projectexplorer/osparser.cpp
@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "osparser.h"
+#include "projectexplorerconstants.h"
+#include "task.h"
+
+#include <utils/hostosinfo.h>
+
+using namespace ProjectExplorer;
+
+OsParser::OsParser() :
+    m_hasFatalError(false)
+{
+    setObjectName(QLatin1String("OsParser"));
+}
+
+void OsParser::stdError(const QString &line)
+{
+    IOutputParser::stdError(line);
+}
+
+void OsParser::stdOutput(const QString &line)
+{
+    if (Utils::HostOsInfo::isWindowsHost()) {
+        const QString trimmed = line.trimmed();
+        if (trimmed == QLatin1String("The process cannot access the file because it is being used by another process.")) {
+            addTask(Task(Task::Error, tr("The process can not access the file because it is being used by another process.\n"
+                                         "Please close all running instances of your application before starting a build."),
+                         Utils::FileName(), -1, Constants::TASK_CATEGORY_COMPILE));
+            m_hasFatalError = true;
+        }
+    }
+    IOutputParser::stdOutput(line);
+}
+
+bool OsParser::hasFatalErrors() const
+{
+    return m_hasFatalError || IOutputParser::hasFatalErrors();
+}
diff --git a/src/plugins/projectexplorer/osparser.h b/src/plugins/projectexplorer/osparser.h
new file mode 100644
index 00000000000..ccc4364ca09
--- /dev/null
+++ b/src/plugins/projectexplorer/osparser.h
@@ -0,0 +1,59 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef OSPARSER_H
+#define OSPARSER_H
+
+#include "ioutputparser.h"
+
+#include <projectexplorer/task.h>
+
+#include <QRegExp>
+
+namespace ProjectExplorer {
+
+class OsParser : public ProjectExplorer::IOutputParser
+{
+    Q_OBJECT
+
+public:
+    OsParser();
+
+    void stdError(const QString &line);
+    void stdOutput(const QString &line);
+
+    bool hasFatalErrors() const;
+
+private:
+    bool m_hasFatalError;
+};
+
+} // namespace ProjectExplorer
+
+#endif // OSPARSER_H
diff --git a/src/plugins/projectexplorer/projectexplorer.pro b/src/plugins/projectexplorer/projectexplorer.pro
index 484db7658f4..6515e3ef99b 100644
--- a/src/plugins/projectexplorer/projectexplorer.pro
+++ b/src/plugins/projectexplorer/projectexplorer.pro
@@ -12,6 +12,7 @@ HEADERS += projectexplorer.h \
     gcctoolchain.h \
     localapplicationrunconfiguration.h \
     localenvironmentaspect.h \
+    osparser.h \
     projectexplorer_export.h \
     projectwindow.h \
     removetaskhandler.h \
@@ -147,6 +148,7 @@ SOURCES += projectexplorer.cpp \
     gcctoolchain.cpp \
     localapplicationrunconfiguration.cpp \
     localenvironmentaspect.cpp \
+    osparser.cpp \
     projectwindow.cpp \
     removetaskhandler.cpp \
     kit.cpp \
diff --git a/src/plugins/projectexplorer/projectexplorer.qbs b/src/plugins/projectexplorer/projectexplorer.qbs
index f0edff32cb6..3c3f423c503 100644
--- a/src/plugins/projectexplorer/projectexplorer.qbs
+++ b/src/plugins/projectexplorer/projectexplorer.qbs
@@ -92,6 +92,7 @@ QtcPlugin {
             "miniprojecttargetselector.cpp", "miniprojecttargetselector.h",
             "namedwidget.cpp", "namedwidget.h",
             "nodesvisitor.cpp", "nodesvisitor.h",
+            "osparser.cpp", "osparser.h",
             "outputparser_test.cpp", "outputparser_test.h",
             "pluginfilefactory.cpp", "pluginfilefactory.h",
             "processparameters.cpp", "processparameters.h",