Client denied access to server

I have a 2 computer network, the server acting set up with “Internet Connection Sharing”.

I have been able to share files between client and server. When using the client, I’m asked to logon to the server when I request access to a shared drive/folder on the server.

Whenever I try this now, I get “The user has not been granted the requested logon type at this computer”, and goes no further.

I haven’t made any intentional config changes, I’ve scanned for viruses, checked local security policy to see I’m not denied access via the network, removed Norton NIS just in case, but all without a solution.

Any ideas greatfully received….

Malcolm.