Disable Remote Registry Service
Click “Start”—“Setup”—“Control panel”—“Management Tools”—“Service”, then all services on local computer are displayed, find the one named “Remote Registry Service”, described as “Allow remote registry operation”, right click it, and choose “Properties”, and then stop the service and disable it.

DOS batch file for file crush
@echo off
REM usage：the batch file name and the file name to shiver
FOR %%f IN (%1) DO (
ECHO Deleting %%f...
COPY NUL %%f /Y >NUL
DEL   %%f /Q
)