I haven't found any useful info about what to do when asked for a password whilst sharing files between Mac and Windows. My scenario: I have ONE user on my Mac (somebrit) and no one else, not even guest. I have ONE fileshare located at /Users/somebrit/share.
I'm using Mountain Lion -> System Preferences -> File Sharing -> SMB Sharing and have selected the folder to share. For all intents and purposes, I've allowed unrestricted access to it.
On the Windows side, I simply hit Start, type \\IP\ and can see the Mac. After clicking it, I'm instantly prompted for a username/password and having tried my-mac\somebrit and the password, nothing.
Can someone please help my sanity and provide some answers?