* First make sure that '''your workgroup or domain match between your HDA and your clients'''. For your HDA's workgroup/domain, go to Setup -> Settings and turn on advanced settings, after that, go to Setup -> Shares -> Settings and check the workgroup name.* Make sure the user has permissions to at least read the share(of course)* In at least Windows 7, we have observed that the operating system tries to use a "Domain" of the name of the computer! Try typing this in the Username field: YOURWORKGROUP\username * So, if your username is jdoe and the workgroup is HOME, try HOME\jdoe