diff --git a/clientgui/AdvancedFrame.cpp b/clientgui/AdvancedFrame.cpp
index c1a20eb169..249e6cc3fc 100644
--- a/clientgui/AdvancedFrame.cpp
+++ b/clientgui/AdvancedFrame.cpp
@@ -913,7 +913,6 @@ bool CAdvancedFrame::SaveState() {
     CBOINCBaseView* pView = NULL;
     wxString        strConfigLocation;
     wxString        strPreviousLocation;
-    wxString        strBuffer;
     int             iIndex = 0;
     int             iItemCount = 0;
 
@@ -975,8 +974,6 @@ bool CAdvancedFrame::RestoreState() {
     CBOINCBaseView* pView = NULL;
     wxString        strConfigLocation;
     wxString        strPreviousLocation;
-    wxString        strBuffer;
-    wxString        strValue;
     long            iIndex;
     long            iPageCount;
     long            iCurrentPage;
@@ -1749,9 +1746,6 @@ void CAdvancedFrame::OnConnect(CFrameEvent& WXUNUSED(event)) {
     CSkinAdvanced* pSkinAdvanced = wxGetApp().GetSkinManager()->GetAdvanced();
     CWizardAttach* pWizard = NULL;
     wxString strComputer = wxEmptyString;
-    wxString strName = wxEmptyString;
-    wxString strURL = wxEmptyString;
-    wxString strTeamName = wxEmptyString;
     wxString strDialogTitle = wxEmptyString;
     wxString strDialogDescription = wxEmptyString;
     std::string strProjectName;
@@ -2015,7 +2009,6 @@ void CAdvancedFrame::OnFrameRender(wxTimerEvent& WXUNUSED(event)) {
                     m_pStatusbar->m_pbmpDisconnect->Hide();
                     m_pStatusbar->m_ptxtDisconnect->Hide();
 
-                    wxString strBuffer = wxEmptyString;
                     wxString strComputerName = wxEmptyString;
                     wxString strComputerVersion = wxEmptyString;
                     wxString strStatusText = wxEmptyString;
diff --git a/clientgui/BOINCDialupManager.cpp b/clientgui/BOINCDialupManager.cpp
index 13ccbc4216..0fbc1e4e35 100644
--- a/clientgui/BOINCDialupManager.cpp
+++ b/clientgui/BOINCDialupManager.cpp
@@ -97,7 +97,6 @@ void CBOINCDialUpManager::OnPoll() {
     bool                bIsOnline = false;
     bool                bWantConnection = false;
     bool                bWantDisconnect = false;
-    wxString            strDialogMessage = wxEmptyString;
     CC_STATUS           cc_status;
 
 
diff --git a/clientgui/BOINCGUIApp.cpp b/clientgui/BOINCGUIApp.cpp
index 653981b016..0717a20303 100644
--- a/clientgui/BOINCGUIApp.cpp
+++ b/clientgui/BOINCGUIApp.cpp
@@ -117,8 +117,9 @@ bool CBOINCGUIApp::OnInit() {
     int      iDesiredLanguageCode = 0;
     bool     bOpenEventLog = false;
     wxString strDesiredSkinName = wxEmptyString;
+#ifdef SANDBOX
     wxString strDialogMessage = wxEmptyString;
-    wxString strOldLanguageCode = wxEmptyString;
+#endif
     bool     success = false;
 
 
diff --git a/clientgui/BOINCTaskBar.cpp b/clientgui/BOINCTaskBar.cpp
index bf8e6255a4..b7f8d635e1 100644
--- a/clientgui/BOINCTaskBar.cpp
+++ b/clientgui/BOINCTaskBar.cpp
@@ -698,7 +698,6 @@ void CTaskBarIcon::UpdateTaskbarStatus() {
 #else
     wxString       strMachineName       = wxEmptyString;
     wxString       strMessage           = wxEmptyString;
-    wxString       strBuffer            = wxEmptyString;
     wxIcon         icnIcon;
 
     pDoc->GetConnectedComputerName(strMachineName);
diff --git a/clientgui/DlgHiddenColumns.cpp b/clientgui/DlgHiddenColumns.cpp
index 442179289c..a12408cceb 100644
--- a/clientgui/DlgHiddenColumns.cpp
+++ b/clientgui/DlgHiddenColumns.cpp
@@ -184,7 +184,6 @@ void CDlgHiddenColumns::CreateCheckboxes() {
 
         CBOINCListCtrl* listCtrl = pView->GetListCtrl();
         wxInt32 iShownColumnCount = listCtrl->GetColumnCount();
-        wxString strHiddenColumns;
         wxArrayInt aOrder(iShownColumnCount);
 
 #ifdef wxHAS_LISTCTRL_COLUMN_ORDER
diff --git a/clientgui/MainDocument.cpp b/clientgui/MainDocument.cpp
index 84513c58ed..53c0fb2bcf 100644
--- a/clientgui/MainDocument.cpp
+++ b/clientgui/MainDocument.cpp
@@ -521,7 +521,6 @@ int CMainDocument::OnInit() {
 
 
 int CMainDocument::OnExit() {
-    wxString         strConnectedCompter = wxEmptyString;
     int              iRetVal = 0;
 
     if (m_pClientManager) {
@@ -2374,7 +2373,6 @@ int CMainDocument::GetStatisticsCount() {
 
 int CMainDocument::GetProxyConfiguration() {
     int     iRetVal = 0;
-    wxString    strEmpty = wxEmptyString;
 
     iRetVal = rpc.get_proxy_settings(proxy_info);
     if (iRetVal) {
diff --git a/clientgui/browser.cpp b/clientgui/browser.cpp
index 831bc70f7d..a0bfe84bbd 100644
--- a/clientgui/browser.cpp
+++ b/clientgui/browser.cpp
@@ -800,7 +800,6 @@ bool detect_cookie_ie_supported_uac(std::string& project_url, std::string& name,
     std::string  domainname;
     std::wstring domainname_w;
     std::wstring name_w;
-    std::wstring value_w;
     size_t       uiDelimeterLocation;
 
     if (!ieframelib) {
diff --git a/clientgui/sg_BoincSimpleFrame.cpp b/clientgui/sg_BoincSimpleFrame.cpp
index fac60e2b9e..cccf337d9d 100644
--- a/clientgui/sg_BoincSimpleFrame.cpp
+++ b/clientgui/sg_BoincSimpleFrame.cpp
@@ -754,9 +754,6 @@ void CSimpleFrame::OnConnect(CFrameEvent& WXUNUSED(event)) {
     CMainDocument*     pDoc = wxGetApp().GetDocument();
     CWizardAttach*     pWizard = NULL;
     wxString strComputer = wxEmptyString;
-    wxString strName = wxEmptyString;
-    wxString strURL = wxEmptyString;
-    wxString strTeamName = wxEmptyString;
     std::string strProjectName;
     std::string strProjectURL;
     std::string strProjectAuthenticator;
diff --git a/clientgui/sg_TaskPanel.cpp b/clientgui/sg_TaskPanel.cpp
index 2bb7c19d4a..bb31f8e351 100644
--- a/clientgui/sg_TaskPanel.cpp
+++ b/clientgui/sg_TaskPanel.cpp
@@ -791,7 +791,6 @@ void CSimpleTaskPanel::GetApplicationAndProjectNames(RESULT* result, wxString* a
     RESULT*        state_result = NULL;
     wxString       strAppBuffer = wxEmptyString;
     wxString       strGPUBuffer = wxEmptyString;
-    wxString pct_done_str = wxEmptyString;
 
     wxASSERT(pDoc);
     wxASSERT(wxDynamicCast(pDoc, CMainDocument));
diff --git a/clientgui/wizardex.cpp b/clientgui/wizardex.cpp
index c1bdc4a1d3..0b3d8a917c 100644
--- a/clientgui/wizardex.cpp
+++ b/clientgui/wizardex.cpp
@@ -482,9 +482,6 @@ bool wxWizardEx::ShowPage(wxWizardPageEx *page, bool goingForward)
     // button or not (initially the label is "Next")
     bool btnLabelWasNext = true;
 
-    // remember the old bitmap (if any) to compare with the new one later
-    wxBitmap bmpPrev;
-
     // check for previous page
     if ( m_page )
     {