diff --git a/oscar/aboutdialog.cpp b/oscar/aboutdialog.cpp
index 312b4c89..98394d6b 100644
--- a/oscar/aboutdialog.cpp
+++ b/oscar/aboutdialog.cpp
@@ -46,6 +46,7 @@ AboutDialog::AboutDialog(QWidget *parent) :
 
     setWindowTitle(tr("About OSCAR"));
     setMinimumSize(QSize(400,400));
+    this->setWindowFlags(this->windowFlags() & ~Qt::WindowContextHelpButtonHint);
     connect(ui->closeButton, SIGNAL(clicked(bool)), this, SLOT(accept()));
 
     int idx=AppSetting->showAboutDialog();
diff --git a/oscar/exportcsv.cpp b/oscar/exportcsv.cpp
index 70163ba9..635922cc 100644
--- a/oscar/exportcsv.cpp
+++ b/oscar/exportcsv.cpp
@@ -26,6 +26,7 @@ ExportCSV::ExportCSV(QWidget *parent) :
     ui->setupUi(this);
     ui->rb1_Summary->setChecked(true);
     ui->quickRangeCombo->setCurrentIndex(0);
+    this->setWindowFlags(this->windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
     // Set Date controls locale to 4 digit years
     QLocale locale = QLocale::system();
diff --git a/oscar/mainwindow.cpp b/oscar/mainwindow.cpp
index 29cc2032..2421bc28 100644
--- a/oscar/mainwindow.cpp
+++ b/oscar/mainwindow.cpp
@@ -2224,6 +2224,7 @@ void MainWindow::on_actionImport_ZEO_Data_triggered()
 {
     QFileDialog w;
     w.setFileMode(QFileDialog::ExistingFiles);
+    this->setWindowFlags(this->windowFlags() & ~Qt::WindowContextHelpButtonHint);
     w.setOption(QFileDialog::ShowDirsOnly, false);
     w.setOption(QFileDialog::DontUseNativeDialog, true);
     w.setNameFilters(QStringList("Zeo CSV File (*.csv)"));
@@ -2307,6 +2308,7 @@ void MainWindow::on_actionImport_Somnopose_Data_triggered()
 {
     QFileDialog w;
     w.setFileMode(QFileDialog::ExistingFiles);
+    this->setWindowFlags(this->windowFlags() & ~Qt::WindowContextHelpButtonHint);
     w.setOption(QFileDialog::ShowDirsOnly, false);
     w.setOption(QFileDialog::DontUseNativeDialog, true);
     w.setNameFilters(QStringList("Somnopause CSV File (*.csv)"));
diff --git a/oscar/oximeterimport.cpp b/oscar/oximeterimport.cpp
index 7953539d..e08cf413 100644
--- a/oscar/oximeterimport.cpp
+++ b/oscar/oximeterimport.cpp
@@ -35,6 +35,7 @@ OximeterImport::OximeterImport(QWidget *parent) :
 {
     ui->setupUi(this);
     setWindowTitle(tr("Oximeter Import Wizard"));
+    this->setWindowFlags(this->windowFlags() & ~Qt::WindowContextHelpButtonHint);
     ui->stackedWidget->setCurrentIndex(0);
     ui->retryButton->setVisible(false);
     ui->stopButton->setVisible(false);