We have got a website (hosted locally but available over the internet) that does not work for everybody. The problem has been reported by internal users having windows vista home. If they go on our website with this address http://example.com, everything is fine. If the address is http://www.example.com it doesn't work, they get a simple error message that suggest to reload the page. It's not all Vista users that have this problem.
For the rest of our group, both address are working. Our server (Windows Server 2008) accept both headers. Cache has been cleared and all browser get the same error on those vista home, so I don't know what to do more. Maybe it's a server security? Any ideas?
As suggested by @TheCleaner I did a ping to our website:
On Windows 7
I get a 209.161.xxx.xx for both website (It's the good address)
I get a 208.69.xx.xxx for the website with www. (the 209.161.xxx.xx should be the good one...but I see my website) I get a 192.168.1.25 without the www. (this was an old server that crashed about 2 month ago)
How do I resolve this? Thanks