I can NOT access from vista to win7 although I can the inverse, PCs connected same subnet same router with RJ45...Well?

I get when went access: SEE ATTACHMENT

 

message clearly says that issue is security. win7 security requires authentication...

 

how remove this? or ... I do NOT see place insert id/pass in vista for access win7, where insert?

 

From http://technet.microsoft.com/en-us/library/bb727037.aspx

With password protected sharing enabled, other computers on your network will not be able to access your shared folders, including the Public folder, without a user name or password that corresponds to a user account on the computer with the shared folder. When a user on another computer tries to connect to the shared folder, they will send the user name and password of the account that they used to log on to their own computer. For example, if they logged on to their computer with the “Bob” account and a password, then the “Bob” name with its password is sent when connecting to a shared folder on another computer.
If there is a “Bob” account with its password on the computer that is sharing the folder, the shared folder connection will be successful (provided the "Bob" account is specified as one of the accounts that can access the share). However, if there is no “Bob” account on the computer that is sharing the folder, the shared folder connection will fail and the user on the other computer will be prompted with a dialog box to type in a user name and password. At this point, the user on the computer attempting to connect can type the name and password of an account on the computer sharing the folder that is specified as one of the accounts that can access the share.
To prevent shared folder connection failures, you can do one of the following:

• Add the same accounts and passwords to all of the computers on your network
  For example, if you have three computers in your home and four family members that use them, add all four accounts with their passwords corresponding to your family members to all three computers. When this is done, each family member can access the shared folders of the other computers, regardless of which computer they are using. This is the recommended method, which provides protection of shared folders and prevents shared folder connection failures.
• Disable password protected sharing
  When you disable password protected sharing, the computer sharing the folder does not require a user account or password. Anyone on your network can access the shared folders of the computer (provided the folder was shared for the Guest or Everyone account). This behavior is equivalent to simple file sharing in Windows XP.

To disable password protected sharing, do the following:

1. In the Sharing and Discovery section of the Network and Sharing Center window, click the down arrow next to Password protected sharing.
2. Within the Password protected sharing settings, click Turn off password protected sharing, and then click Apply.