diff --git a/src/Mayaqua/Microsoft.c b/src/Mayaqua/Microsoft.c
index 02e8945e..53513083 100644
--- a/src/Mayaqua/Microsoft.c
+++ b/src/Mayaqua/Microsoft.c
@@ -8462,164 +8462,6 @@ bool MsUpgradeVLanWithoutLock(char *tag_name, char *connection_tag_name, char *i
 
 	return ret;
 }
-bool MsUpgradeVLanWithoutLock_old(char *tag_name, char *connection_tag_name, char *instance_name, MS_DRIVER_VER *ver)
-{
-	wchar_t infpath[MAX_PATH];
-	char hwid[MAX_PATH];
-	wchar_t hwid_w[MAX_PATH];
-	bool ret = false;
-	bool need_reboot;
-	bool before_status;
-	UCHAR old_mac_address[6];
-	UCHAR new_mac_address[6];
-	char *s;
-	NO_WARNING *nw;
-	char neo_sys[MAX_PATH];
-	char *reg_key;
-	UINT i;
-	// Validate arguments
-	if (instance_name == NULL || tag_name == NULL || connection_tag_name == NULL || ver == NULL)
-	{
-		return false;
-	}
-
-	if (MsIsNt() == false)
-	{
-		// Can not be upgraded in Windows 9x
-		return false;
-	}
-
-	if (MsIsInfCatalogRequired())
-	{
-		if (MsIsValidVLanInstanceNameForInfCatalog(instance_name) == false)
-		{
-			return false;
-		}
-
-		StrUpper(instance_name);
-	}
-
-	Zero(hwid, sizeof(hwid));
-	Format(hwid, sizeof(hwid), DRIVER_DEVICE_ID_TAG, instance_name);
-	StrToUni(hwid_w, sizeof(hwid_w), hwid);
-
-	// Examine whether the virtual LAN card with the specified name has already registered
-	if (MsIsVLanExists(tag_name, instance_name) == false)
-	{
-		// Not registered
-		return false;
-	}
-
-	reg_key = MsGetNetCfgRegKeyName(tag_name, instance_name);
-
-	if (IsEmptyStr(reg_key) == false)
-	{
-		// Add a value to the registry key
-		MsRegWriteInt(REG_LOCAL_MACHINE, reg_key, "*IfType", 6);
-		MsRegWriteInt(REG_LOCAL_MACHINE, reg_key, "*MediaType", 0);
-		MsRegWriteInt(REG_LOCAL_MACHINE, reg_key, "*PhysicalMediaType", 0);
-	}
-	Free(reg_key);
-
-	// Get the .sys file name that is currently being used
-	if (MsGetNeoDeiverFilename(neo_sys, sizeof(neo_sys), instance_name) == false)
-	{
-		if (MsIsInfCatalogRequired())
-		{
-			// Can not be upgraded if getting current .sys file name failed
-			// in the Windows 8 or later
-			return false;
-		}
-
-		// Create a new file name because it is unknown
-		if (MsMakeNewNeoDriverFilename(neo_sys, sizeof(neo_sys)) == false)
-		{
-			// Failure
-			return false;
-		}
-	}
-
-	// Get the current operating status
-	before_status = MsIsVLanEnabled(instance_name);
-
-	// Get the previous MAC address
-	s = MsGetMacAddress(tag_name, instance_name);
-	if (s == NULL)
-	{
-		Zero(old_mac_address, 6);
-	}
-	else
-	{
-		BUF *b;
-		b = StrToBin(s);
-		Free(s);
-
-		if (b->Size == 6)
-		{
-			Copy(old_mac_address, b->Buf, b->Size);
-		}
-		else
-		{
-			Zero(old_mac_address, 6);
-		}
-
-		FreeBuf(b);
-	}
-
-	// Starting the installation
-	if (MsStartDriverInstall(instance_name, IsZero(old_mac_address, 6) ? NULL : old_mac_address, neo_sys,
-		new_mac_address, ver) == false)
-	{
-		return false;
-	}
-	MsGetDriverPath(instance_name, NULL, NULL, infpath, NULL, NULL, NULL, neo_sys);
-
-	nw = NULL;
-
-	//if (MsIsVista() == false)
-	{
-		nw = MsInitNoWarning();
-	}
-
-	// Do the installation
-	if (ms->nt->UpdateDriverForPlugAndPlayDevicesW(
-		NULL, hwid_w, infpath, 1, &need_reboot))
-	{
-		ret = true;
-	}
-	MsFreeNoWarning(nw);
-
-	// Installation complete
-	MsFinishDriverInstall(instance_name, neo_sys);
-
-	for (i = 0;i < 5;i++)
-	{
-		MsInitNetworkConfig(tag_name, instance_name, connection_tag_name);
-		if (MsIsInfCatalogRequired())
-		{
-			// Write the MAC address
-			char mac_address_str[MAX_SIZE];
-			BinToStr(mac_address_str, sizeof(mac_address_str), new_mac_address, sizeof(new_mac_address));
-			MsSetMacAddress(VLAN_ADAPTER_NAME_TAG, instance_name, mac_address_str);
-		}
-
-		SleepThread(MsIsVista() ? 1000 : 300);
-	}
-
-	SleepThread(MsIsVista() ? 1000 : 300);
-
-	// Restore operation
-	if (before_status)
-	{
-		MsEnableVLan(instance_name);
-	}
-	else
-	{
-		MsDisableVLan(instance_name);
-	}
-
-	return ret;
-}
 
 // Test for Windows 9x
 void MsWin9xTest()