here is a simple trick to lock your system, without any software you can lock your’s or your friend system…
1)start —->run —->type..SYSKEY —> hit enter
2)then a dialog box will open
3)there..you’ll find one button..UPDATE…click on dat
and then..tick the..option password startup…
4)and put your…desired password……..
5)restart ur system…n see the magic…..
n dats it….u did…..
