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[2825] Network Level Authentication Error on Windows XP.

Symptom

While using the Parallels Client on Windows XP Machine you will the following error:

    [2825] Network Level Authentication Error 

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Cause

Windows XP does not support Network Level Authentication.

Resolution

The issue may be workaround by performing the steps below:

  1. Install WindowsXP-KB969084-x86-enu update

  2. Open Registry Editor (regedit).
  3. Navigate to:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
    
  4. Modify the key named Security Packages

  5. Add tspkg to the listing of security packages.

    Note: Do not remove any packages.

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  6. Modify the key named SecurityProviders

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders
    
  7. Add credssp.dll to the listing of Security Providers.

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