diff --git a/src/include/about.cpp b/src/include/about.cpp
index 5ec21b5cb..5b2ec99b9 100755
--- a/src/include/about.cpp
+++ b/src/include/about.cpp
@@ -558,9 +558,20 @@ TInfo_mask::TInfo_mask() : TProperty_sheet(TR("Informazioni"))
 	add_prop(TR("Libreria Matematica"), "GreenLeaf Library");
 
 #ifdef _MSC_VER
-  const int cver = _MSC_VER / 100 - 6;
-  const int csub = _MSC_VER % 100;
-  add_prop(TR("Libreria C++"),  format("Microsoft Visual Studio %d.%d", cver, csub));
+	int cver = 0, csub = 0;
+	if (_MSC_VER < 1900)
+	{
+		cver = _MSC_VER / 100 - 6;
+		csub = _MSC_VER % 100;
+	}
+	else
+	{
+		// 1900 -> 14, 1910 -> 15
+		cver = _MSC_VER;
+		cver = _MSC_VER / 100 - 5 + _MSC_VER % 100 / 10;
+		csub = _MSC_VER % 100 % 10; // Is that a thing?
+	}
+	add_prop(TR("Libreria C++"), format("Microsoft Visual Studio %d.%d", cver, csub));
 #endif
 
   set_read_only();
diff --git a/src/include/cfiles.c b/src/include/cfiles.c
index 7383bc494..92a01840c 100755
--- a/src/include/cfiles.c
+++ b/src/include/cfiles.c
@@ -226,7 +226,7 @@ void CPutFile(logicname,filed,dirflg)
   int                     dirflg; /* flag per file comuni */
 
 {
-  CWrite(&fdir[dirflg],(RecType)filed,(long) logicname, UnLock);
+	CWrite(&fdir[dirflg], (RecType)filed, (long)logicname, NoLock /* non viene mai bloccato UnLock*/);
 }
 
 /*