readme.phys.ethz.ch/windows/how_to_enable_icmp_echo_requests...

The default setting in a freshly installed and updated Windows XP installation has the built-in firewall configured such that the computer does not answer ICMP echo request, also called pings. Unfortunately, this way the DHCP server has no possibility ...

www.sysprobs.com/enable-ping-in-xp

When Windows firewall is on (as the default settings) in Windows XP computer, it will not respond to ping requests, so obviously you can’t ping to the particular computer. You will be getting ‘Request Time Out’ reply from the destinat ...