Question

一个路由器,两台电脑都能上网,但是互相ping不通。

一个路由器，连接两台电脑，一台台式机，一台笔记本。
两台电脑都能上网,但是两台电脑互相ping不通。
这两台电脑一个是192.168.1.100，另一个是192.168.1.101(都是自动获取的)
用笔记本(192.168.1.100)ping台式机：
C:\Documents and Settings\Administrator>ping 192.168.1.101

Pinging 192.168.1.101 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 192.168.1.101:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
=================================================================
用笔记本(192.168.1.100)ping路由器：
C:\Documents and Settings\Administrator>ping 192.168.1.1

Pinging 192.168.1.1 with 32 bytes of data:

Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
路由器的UPnP已经启用，不知道有没有关系。
不知道锁的符号是什么意思(见图片)：

Answer 1

估计是放火墙加G盘带来的麻烦
恢复下系统的初始设置

Answer 2

其中一台或两了防火墙？