具体教你软件限制运行次数是怎么实现的，没有解压密码-teach you specific software to limit the number of operations is how to achieve, and not extracting passwords

网络过滤工具，能自己添加需要限制的内容。-Internet filtering tools that can add the need to limit their own content.

适用winxp win7实测可用,可以控制用户修改网卡ip地址,并限定访问特定的ip段.-Applicable win7 WinXP measured available, you can control the user to modify the network card IP address, and limit access to specific IP segments.