If one particular web page is running slowly or not responding
a trace route can identify where the problem lies.
You must be connected to do this
At the DOS prompt type tracert www.btinternet.com
Substitute btinternet.com for the url You are having problems with.
It is not unusual for some of the "hops" to time out, however as
per this trace, it may pick up again. If it does not however you
will be able to see the last server that responded and that will
give you an indication as to whether the problem lies with there
server or not.