Hi everybody. I have Small Business network with one file server and 25 workstations in workgroup. Lately I've been experiencing some difficulties. Latest: one of the user cannot sign in into network share on the file server from one computer but can do it from another. I setup same profile with credentials and one is Ok but not another. All workstations have Windows 7 64 bit and our file server is Windows Server 2008 R2. I tried few things suggested on this site but it didn't work.