The client complained that he was sure he was typing the correct user and password but the Buffalo Terastation at his company office kept denying him access. The fix for the client was pretty quick and painless, if you have similar issues you can try editing your registry (take usual backup precautions and then do a regedit for HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Lsa and for the LMCompatabilityLevel DWORD value data set it to 1, you can try creating the value first if its not in there.) You can probably also try doing the same thing through the local security policy with secpol.msc, in security options setting the Lan Manager Authentication Level to “Send LM & NLTM, use NTMLv2 session if negotiated”.