diff --git a/client/app.C b/client/app.C
index acf1877764..40a3413683 100644
--- a/client/app.C
+++ b/client/app.C
@@ -240,7 +240,7 @@ int ACTIVE_TASK::start(bool first_time) {
                     printf("link %s to %s\n", file_path, link_path);
                 }
                 if (file_ref.copy_file) {
-                    retval = boinc_copy(buf, link_path);
+                    retval = boinc_copy(file_path, link_path);
                     if (retval) {
                         msg_printf(wup->project, MSG_ERROR, "Can't copy %s to %s", file_path, link_path);
                         fclose(f);
diff --git a/client/win/Stackwalker.cpp b/client/win/Stackwalker.cpp
index d8ffcc0c68..25fc2072df 100755
--- a/client/win/Stackwalker.cpp
+++ b/client/win/Stackwalker.cpp
@@ -632,6 +632,7 @@ static void AllocHashInit(void) {
 // Returns the number of bytes, that are not freed (leaks)
 static ULONG AllocHashDeinit(void) {
   ULONG ulRet = 0;
+  return 0;
   bool bAppend = g_CallstackOutputType != ACOutput_XML;
   AllocCheckFileOpen(bAppend);  // open global log-file
 
diff --git a/lib/filesys.C b/lib/filesys.C
index 0ce228760a..33fd16e4b2 100755
--- a/lib/filesys.C
+++ b/lib/filesys.C
@@ -326,7 +326,10 @@ int dir_size(char* dirpath, double& size) {
 
 int boinc_copy(char* orig, char* newf) {
 #ifdef _WIN32
-	return !CopyFile(orig, newf, FALSE);
+	if(CopyFile(orig, newf, FALSE))
+		return 0;
+	else
+		return GetLastError();
 #else
 	char cmd[256];
 	sprintf(cmd, "cp %s %s", orig, newf);