I have a really strange problem.
My Network (A) Other Network (B)
1 - When reinstalling XP or Windows 7, Internet Explorer 8 gives a message like: Default Mail Client Is Not Properly Installed network (A)
2 - When connecting this computer to an other provider network (B), this problem does not exist.
3 - When connecting a totally other computer to my providers network (A), the same message appears.
It looks like something in the network/modem/router triggers this event.
Does anyone see any light in the end of the tunnel?