Hi

I am experiencing a very strange problem with a number of networked
windows PC's (mainly XP) that cannot browse particular websites.
For example: amazon.co.uk, fedex.com, ups.com

All PC's run fully patched XP SP2 with I.E. ver 6.0.2xxx.
The hardware is identical from the same supplier batch.
They also have identical software installations, DNS entries and
anti-virus software setup and share the same broadband line.
Some PC's can access the sites mentioned others display the usual I.E.
website not found page!

Here's what I've tried so far:

Cleared all offline content and content from I.E.
Installed I.E. ver 7
Installed Firefox
Tried the same sites on a number of Win98SE machines and again some can
access the sites and some cannot.
Tried a different broadband connection.

>From cmd prompt pinged the relevent sites and after a short delay (2-3


seconds) the IP address of the site resolves out and ping packets are
received back with no failure.
If the discovered IP address of the affected sites are entered direct
into the I.E. address bar the websites can be viewed.

To me this points to some sort of DNS resolution problem, perhaps the
delay is significant?

Any suggestions of other things to try would be greatly appreciated as
I am fresh out of ideas.
Regards
Matt