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I have two Windows XP computers connected through an Ad-Hoc network, computer A creates the network and B connects to it. Both computers are on the Mshome network and have file and printer sharing enabled, and they can ping one another through the adhoc network.

The result is that computer A can see computer B, but B cannot see A in the workgroup. But when A tries to access B I get a "you might not have permission to access" error telling me to contact the administrator.

I tries to google the error, but most posts talk about problems connecting different versions of Windows to each other. I tried turning off the firewalls on both machines and checking if the required services are running. Nothing helped.

Please excuse my ignorance on Windows networking, I haven't used Windows in around 10 years.

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Have you ensured you have a matching user name and password on both computers? –  techie007 Jun 2 '12 at 14:44
    
Nope, but in my experience that is not a requirement to share data through a windows network. Am I wrong? –  Afiefh Jun 2 '12 at 20:16
    
It often has to be that way in a Workgroup. –  techie007 Jun 2 '12 at 20:18
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1 Answer

Before going ahead backup your registry data or create a system restore point.

  • Click Start, click Run, type regedit, and then click OK
  • Locate and then double-click the following registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa

  • On the right side, double-click restrictanonymous.
  • Make sure that the value in the Value data box is set to 0, and then click OK.
  • Close Registry Editor and Restart the computer.
There are several other reasons that you get this error, you can find some resources here

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Both computers had restrictanonymous set to 0. –  Afiefh Jun 2 '12 at 20:16
    
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