Hi,
I just would like to share the solution to this problem, since I couldn't find a corresponding entry in the forum, and I had the Norton support to figure it out.
I installed NIS 2012 over NIS 2010 on XP Pro.
Previously the guest account could access the network (browsing); after the upgrade it wasn't possible anymore.
The only other account (from which I installed NIS) had no problem.
The solution was
- to create an additional test account (user) with limited rights
- disable/enable the guest account
- login with test and guest account and check the network was available again
- delete the test account.
Hope it can help someone.