Possible Duplicate:
Windows 7 unidentified network direct cable connection
I connect the internet through Ad-hoc network, My machine uses win7 and another uses winows xp, There's no problem when I connect the XP machine, but if i disconnect and reconnect the net, then my local network is marked as "Unidentified network",unless restart the XP machine, I don't know why?
Could you clarify which computer has the internet connection? If the Windows 7 computer is the one sharing the ad-hoc network to the Windows XP computer, you might want to look into using Connectify instead of running an ad-hoc with internet connection sharing. Connectify uses windows 7's built-in support for emulating an access point to allow you to share an internet connection with just a laptop wireless card, but appear as a regular AP, not an ad-hoc. It is much less buggy than ICS, in my experience. I haven't used it since the beta, but it's free, and I recall it working pretty well even back then.
