diff --git a/cockatrice/src/carddatabase.cpp b/cockatrice/src/carddatabase.cpp
index 2e5c0ec7..5a942b0f 100644
--- a/cockatrice/src/carddatabase.cpp
+++ b/cockatrice/src/carddatabase.cpp
@@ -16,12 +16,6 @@
 
 const int CardDatabase::versionNeeded = 3;
 
-CardSet::CardSet(const QString &_shortName, const QString &_longName)
-    : shortName(_shortName), longName(_longName)
-{
-    updateSortKey();
-}
-
 QXmlStreamWriter &operator<<(QXmlStreamWriter &xml, const CardSet *set)
 {
     xml.writeStartElement("set");
@@ -32,6 +26,24 @@ QXmlStreamWriter &operator<<(QXmlStreamWriter &xml, const CardSet *set)
     return xml;
 }
 
+CardSet::CardSet(const QString &_shortName, const QString &_longName)
+    : shortName(_shortName), longName(_longName)
+{
+    updateSortKey();
+}
+
+QString CardSet::getCorrectedShortName() const
+{
+    // Because windows is horrible.
+    QSet<QString> invalidFileNames;
+    invalidFileNames << "CON" << "PRN" << "AUX" << "NUL" << "COM1" << "COM2" <<
+        "COM3" << "COM4" << "COM5" << "COM6" << "COM7" << "COM8" << "COM9" <<
+        "LPT1" << "LPT2" << "LPT3" << "LPT4" << "LPT5" << "LPT6" << "LPT7" <<
+        "LPT8" << "LPT9";
+
+    return invalidFileNames.contains(shortName) ? shortName + "_" : shortName;
+}
+
 void CardSet::setSortKey(unsigned int _sortKey)
 {
     sortKey = _sortKey;
diff --git a/cockatrice/src/carddatabase.h b/cockatrice/src/carddatabase.h
index 5e83080c..70d77bca 100644
--- a/cockatrice/src/carddatabase.h
+++ b/cockatrice/src/carddatabase.h
@@ -26,6 +26,7 @@ private:
     unsigned int sortKey;
 public:
     CardSet(const QString &_shortName = QString(), const QString &_longName = QString());
+    QString getCorrectedShortName() const;
     QString getShortName() const { return shortName; }
     QString getLongName() const { return longName; }
     int getSortKey() const { return sortKey; }
@@ -51,7 +52,7 @@ public:
     PictureToLoad(CardInfo *_card = 0, bool _stripped = false, bool _hq = true);
     CardInfo *getCard() const { return card; }
     bool getStripped() const { return stripped; }
-    QString getSetName() const { return sortedSets[setIndex]->getShortName(); }
+    QString getSetName() const { return sortedSets[setIndex]->getCorrectedShortName(); }
     bool nextSet();
     bool getHq() const { return hq; }
     void setHq(bool _hq) { hq = _hq; }
diff --git a/cockatrice/src/main.cpp b/cockatrice/src/main.cpp
index 395f25c1..84765814 100644
--- a/cockatrice/src/main.cpp
+++ b/cockatrice/src/main.cpp
@@ -121,7 +121,7 @@ int main(int argc, char *argv[])
     if (translationPath.isEmpty()) {
 #ifdef Q_OS_MAC
         translationPath = QLibraryInfo::location(QLibraryInfo::TranslationsPath);
-#elif Q_OS_WIN
+#elif defined(Q_OS_WIN)
         translationPath = app.applicationDirPath() + "/translations";
 #endif
     }
diff --git a/nsis/cockatrice.nsi b/nsis/cockatrice.nsi
index 90ebfe50..27f55ce3 100644
--- a/nsis/cockatrice.nsi
+++ b/nsis/cockatrice.nsi
@@ -1,7 +1,7 @@
 !include "MUI2.nsh"
 !include "FileFunc.nsh"
 
-!define /date TIMESTAMP "%Y%m%d" 
+!define /date TIMESTAMP "%Y%m%d"
 !searchparse /file ../build/cockatrice/version_string.cpp '= "' VERSION '";'
 
 Name "Cockatrice"
@@ -52,7 +52,7 @@ Section "Application" SecApplication
 
 	SetOutPath "$INSTDIR\zonebg"
 	File /r ..\zonebg\*.*
-	
+
 	SetOutPath "$INSTDIR\plugins"
 	SetOutPath "$INSTDIR\plugins\codecs"
 	File "${QTDIR}\plugins\codecs\qcncodecs4.dll"
@@ -67,7 +67,7 @@ Section "Application" SecApplication
 
 	SetOutPath "$INSTDIR\sounds"
 	File /r ..\sounds\*.*
-	
+
 	SetOutPath "$INSTDIR\translations"
 	File /r ..\build\cockatrice\*.qm
 
@@ -83,10 +83,10 @@ Section "Application" SecApplication
 SectionEnd
 
 Section "Update configuration" SecUpdateConfig
-	WriteRegStr HKCU "Software\Cockatrice\Cockatrice\paths" "carddatabase" "$INSTDIR\cards.xml"
-	WriteRegStr HKCU "Software\Cockatrice\Cockatrice\paths" "decks" "$INSTDIR\decks"
-	WriteRegStr HKCU "Software\Cockatrice\Cockatrice\paths" "pics" "$INSTDIR\pics"
-	WriteRegStr HKCU "Software\Cockatrice\Cockatrice\sound" "path" "$INSTDIR\sounds"
+	WriteRegStr HKCU "Software\Cockatrice\Cockatrice\paths" "carddatabase" "$APPDATA\Cockatrice\cards.xml"
+	WriteRegStr HKCU "Software\Cockatrice\Cockatrice\paths" "decks" "$APPDATA\Cockatrice\decks"
+	WriteRegStr HKCU "Software\Cockatrice\Cockatrice\paths" "pics" "$APPDATA\Cockatrice\pics"
+	WriteRegStr HKCU "Software\Cockatrice\Cockatrice\sound" "path" "$APPDATA\Cockatrice\sounds"
 SectionEnd
 
 Section "Start menu item" SecStartMenu
@@ -115,7 +115,7 @@ SetShellVarContext all
 	Delete "$INSTDIR\QtMultimedia4.dll"
 	RMDir "$INSTDIR"
 
-	RMDir /r "$SMPROGRAMS\Cockatrice"
+	RMDir "$SMPROGRAMS\Cockatrice"
 
 	DeleteRegKey HKCU "Software\Cockatrice"
 	DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice"