Title says it all. Vista prompts for username/password to access a shared folder on an XP machine on my network. What do I have to do to fix this now? UPnP service and SSDP service is set to auto on the XP box. The folder is shared publicly on the network, not just local. Vista seems to think that it needs authentication to access the file. How could I disable this. Oh, and password protection is already disabled.