diff --git a/samples/virtualbox/provider.cpp b/samples/virtualbox/provider.cpp
index 9c3a25f0..ea40c1b2 100644
--- a/samples/virtualbox/provider.cpp
+++ b/samples/virtualbox/provider.cpp
@@ -62,10 +62,7 @@ void Provider::SetTotal(int nTotal)
 }
 
 void Provider::RemoveTask(int nIndex)
-{
-	// ¼ÓËø
-	nbase::NAutoLock auto_lock(&lock_);
-	
+{	
 	lock_.Lock();
 
 	auto iter =	m_vTasks.begin() + nIndex;