It's an NTLM v2 authentication issue. Windows 7 only allows NTLM v2 and not LM (LAN MANAGER) authentication. You need to "dumb down" Windows 7 to make it work.
See http://serverfault.com/questions/69049/system-error-58-while-accessing-share s-on-win-7-from-xp/69113#69113 From: [email protected] [mailto:[email protected]] On Behalf Of David Burstin Sent: Saturday, 19 June 2010 21:32 To: ozDotNet Subject: [OT] Trouble setting up workgroup at home with XP and Win 7 machines Hi all, I've had a workgroup running at home for years without problems. I recently replaced an XP machine with a windows 7 one and can't get them to see each other on the network. I've done heaps of Google searches and am overwhelmed with the amount of (mis)information out there. So far nothing has helped. For now I'm just trying to have 2 machines in the network (small steps). The first is called MEDIA (it's an XP Media Center), the second is called MOTHER (Win 7). The workgroup is called VALHALLA. (I did have a third machine - a Windows 7 laptop. It had no problem seeing MOTHER. It's turned off while I try to get the desktops working). >From MOTHER, if I click on Network, I can see the MEDIA machine, however when I click on it I get "Windows cannot access \\MEDIA. Check the spelling of the name. Otherwise there may be a problem with your network....". Clicking Diagnose gets me nowhere. >From MEDIA I can't even see MOTHER. That's the basic info. Not sure what else to tell you, but am happy to answer any questions. Any help would be GREATLY appreciated. Cheers Dave
