diff --git a/core/HalfLife2.cpp b/core/HalfLife2.cpp
index 9e2bad5b..27007a03 100644
--- a/core/HalfLife2.cpp
+++ b/core/HalfLife2.cpp
@@ -1212,6 +1212,45 @@ bool IsWindowsReservedDeviceName(const char *pMapname)
 }
 #endif 
 
+#if SOURCE_ENGINE >= SE_LEFT4DEAD && defined PLATFORM_WINDOWS
+// This frees memory allocated by the game using the game's CRT on Windows,
+// avoiding a crash due to heap corruption (issue #910).
+template< class T, class I >
+class CUtlMemoryGlobalMalloc : public CUtlMemory< T, I >
+{
+	typedef CUtlMemory< T, I > BaseClass;
+
+public:
+	using BaseClass::BaseClass;
+
+	void Purge()
+	{
+		if (!IsExternallyAllocated())
+		{
+			if (m_pMemory)
+			{
+				UTLMEMORY_TRACK_FREE();
+				g_pMemAlloc->Free((void*)m_pMemory);
+				m_pMemory = 0;
+			}
+			m_nAllocationCount = 0;
+		}
+		BaseClass::Purge();
+	}
+};
+
+void CHalfLife2::FreeUtlVectorUtlString(CUtlVector<CUtlString, CUtlMemoryGlobalMalloc<CUtlString>> &vec)
+{
+	CUtlMemoryGlobalMalloc<unsigned char> *pMemory;
+	FOR_EACH_VEC(vec, i)
+	{
+		pMemory = (CUtlMemoryGlobalMalloc<unsigned char> *) &vec[i].m_Storage.m_Memory;
+		pMemory->Purge();
+		vec[i].m_Storage.SetLength(0);
+	}
+}
+#endif
+
 SMFindMapResult CHalfLife2::FindMap(const char *pMapName, char *pFoundMap, size_t nMapNameMax)
 {
 	/* We need to ensure user input does not contain reserved device names on windows */
@@ -1245,8 +1284,13 @@ SMFindMapResult CHalfLife2::FindMap(const char *pMapName, char *pFoundMap, size_
 
 	static size_t helperCmdLen = strlen(pHelperCmd->GetName());
 
+#ifdef PLATFORM_WINDOWS
+	CUtlVector<CUtlString, CUtlMemoryGlobalMalloc<CUtlString>> results;
+	pHelperCmd->AutoCompleteSuggest(pMapName, *(CUtlVector<CUtlString, CUtlMemory<CUtlString>>*)&results);
+#else
 	CUtlVector<CUtlString> results;
 	pHelperCmd->AutoCompleteSuggest(pMapName, results);
+#endif
 	if (results.Count() == 0)
 		return SMFindMapResult::NotFound;
 
@@ -1258,11 +1302,17 @@ SMFindMapResult CHalfLife2::FindMap(const char *pMapName, char *pFoundMap, size_
 	bool bExactMatch = Q_strcmp(pMapName, &results[0][helperCmdLen + 1]) == 0;
 	if (bExactMatch)
 	{
+#ifdef PLATFORM_WINDOWS
+		FreeUtlVectorUtlString(results);
+#endif
 		return SMFindMapResult::Found;
 	}
 	else
 	{
 		ke::SafeStrcpy(pFoundMap, nMapNameMax, &results[0][helperCmdLen + 1]);
+#ifdef PLATFORM_WINDOWS
+		FreeUtlVectorUtlString(results);
+#endif
 		return SMFindMapResult::FuzzyMatch;
 	}
 
diff --git a/core/HalfLife2.h b/core/HalfLife2.h
index 6393a3ce..9a1662af 100644
--- a/core/HalfLife2.h
+++ b/core/HalfLife2.h
@@ -179,6 +179,12 @@ enum class SMFindMapResult : cell_t {
 	PossiblyAvailable
 };
 
+#if SOURCE_ENGINE >= SE_LEFT4DEAD && defined PLATFORM_WINDOWS
+template< class T, class I = int >
+class CUtlMemoryGlobalMalloc;
+class CUtlString;
+#endif
+
 class CHalfLife2 : 
 	public SMGlobalClass,
 	public IGameHelpers
@@ -229,6 +235,9 @@ public: //IGameHelpers
 	bool IsMapValid(const char *map);
 	SMFindMapResult FindMap(char *pMapName, size_t nMapNameMax);
 	SMFindMapResult FindMap(const char *pMapName, char *pFoundMap = NULL, size_t nMapNameMax = 0);
+#if SOURCE_ENGINE >= SE_LEFT4DEAD && defined PLATFORM_WINDOWS
+	void FreeUtlVectorUtlString(CUtlVector<CUtlString, CUtlMemoryGlobalMalloc<CUtlString>> &vec);
+#endif
 	bool GetMapDisplayName(const char *pMapName, char *pDisplayname, size_t nMapNameMax);
 #if SOURCE_ENGINE >= SE_ORANGEBOX
 	string_t AllocPooledString(const char *pszValue);