I have several Xp Pro computers, I am able to connect to, and share files and printers from almost all, Same workgroup, same subnet, the problem is : two of them have exactly the same username, and because i have (classicsecurity model for local accounts, authenticating as themselves) the error msg i get is xxx is not accesible, logon failure: user account restriction. possible reasons: blank passwords, or a policy restriction.i am able to ping it, and see it under network places, etc, the other computers (with different usernames, are able to connect to and from), i tried EVERYTHING, (well, pretty much), including chaging model to guest only, and it came up with the "connect to xx" screen, which allowed me to type a password, but the Guest account was already typed in, and in gray background (not being able to type something else).I do not want to change username on any, one because is mine, the other is my nephew, and have to deal with configuring workspace again, i wonder if there is a table or a registry value which flush current binding to this same username on host or client,I know this is something for like 5-10 min, but it has taken me months, i usually resorted to using cd's or thumb drives. I have to acknowledge and be grateful not only is someone comes with an answer, but to microsoft for coming with this idea of making tech support more "social", because browsing thru dozens of kb's, or technet articles, has wore me out before many times. I have to admit, this is the first time I came to ask for help.Very much obliged.1 person needs an answerI do too

I'm not really sure what you've done but here is the troubleshooting tree. Take the bits you need. If my troubleshooting steps don't work for you, then MVP Hans-Georg Michna has an excellent Small Network Troubleshooter to go through here - http://winhlp.com/wxnet.htm For XP, start by running the Network Setup Wizard on all machines (see caveat in Item A below). Problems sharing files between computers on a network are generally caused by 1) a misconfigured firewall or overlooked firewall (including a stateful firewall in a VPN); or 2) inadvertently running two firewalls such as the built-in Windows Firewall and a third-party firewall; and/or 3) not having identical user accounts and passwords on all Workgroup machines; 4) trying to create shares where the operating system does not permit it. A. Configure firewalls on all machines to allow the Local Area Network (LAN) traffic as trusted. With Windows Firewall, this means allowing File/Printer Sharing on the Exceptions tab. Normally running the Network Setup Wizard on XP will take care of this for those machines.The only "gotcha" is that this will turn on the XPSP2 Windows Firewall. If you aren't running a third-party firewall or have an antivirus/security program with its own firewall component, then you're fine. With third-party firewalls,I usually configure the LAN allowance with an IP range. Ex. would be 192.168.1.0-192.168.1.254. Obviously you would substitute your correct subnet. Refer to any third party security program's Help or user forums for how to properly configure its firewall. Do not run more than one firewall. DO NOT TURN OFF FIREWALLS; CONFIGURE THEM CORRECTLY. B. For ease of organization, put all computers in the same Workgroup. This is done from the System applet in Control Panel, Computer Name tab. C. In Vista, turn Password Protected Sharing ON . Create matching user accounts and passwords on all machines. You do not need to be logged into the same account on all machines and the passwords assigned to each user account can be different; the accounts/passwords just need to exist and match on all machines. DO NOT NEGLECT TO CREATE PASSWORDS, EVEN IF ONLY SIMPLE ONES . If you wish a machine to boot directly to the Desktop (into one particular user's account) for convenience, you can do this: XP - Configure Windows to Automatically Login (MVP Ramesh) - http://windowsxp.mvps.org/Autologon.htm D. If one or more of the computers is XP Pro or Media Center, turn off Simple File Sharing (Folder Options>View tab). E. Create shares as desired. XP Home does not permit sharing of users' home directories or Program Files, but you can share folders inside those directories. A better choice is to simply use the Shared Documents folder. See the first link above for details about Vista sharing. MS-MVP - Elephant Boy Computers - Don't Panic!