一个锁屏幕的程序，不再电脑旁时，防止被其他人看你的电脑资料-A lock screen program is no longer next time the computer, and prevent other people to read your computer data

实现网吧免费上网功能，当点击结账号，不锁屏，不蓝屏，不关机，正常使用~-To achieve free internet cafe features, click the knot when the account does not lock screen, no blue screen, not shutdown, normal use ~