I've got two computers, a desktop and a laptop, both running Windows 7 Ultimate x64. The desktop is wired to the router, the laptop is wireless. On the desktop there are two user accounts, my own and my wife's, on the laptop there is just one user account, my wife's. My wife's account name is the same on both the desktop and the laptop. All accounts are password protected. Neither computer is part of a HomeGroup.
Now, one of the first things I did while setting up the laptop was set up access to my shared files on the desktop. That was no problem at all. I double-clicked the desktop's icon in the Network window, put in my user name and password (which itself was a little odd because I have password-protected sharing turned off on the desktop) and clicked ok and it connected right up.
Later I tried doing it the other way around, accessing the laptop's shared files from the desktop. Like I said before, neither computer is part of a HomeGroup, but I set up the advanced sharing settings exactly the same as on the desktop. I didn't have a password set to the laptop's user account, so I set one, then tried to open the laptop's icon from the Network window. It asked for a user name and password, so I put in the user name and password from the laptop and it rejected it, saying that one or the other was invalid, but it also replaced the account picture with the one that's in use by my wife's account on the desktop, so I prepended the laptop's computer name to the user name: COMPUTER\USERNAME, then the password...still didn't work.
I've tried everything I can think of. I know that capitalization isn't the issue because I typed the password into Notepad first and copied it into the password box. I know the user name and password are right, I just can't figure out what the heck is going wrong?! Can someone help me out, please. I'd really appreciate it.