@jimmy bush -- Thanks ! I am surprised that the instruction from 2006 still works for Windows7, 6 years later. I got the login box poped up when trying to access to one of my network storage (the others are accessed OK) and it refused all of my login. After setting the network security level to "Send LM & NTLM responses", it accepts my first password and allows me to access to the NAS. Thanks again.
