SYMPTOM
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Server - Windows server 2003 SP2 Standard.
Role of the server - File server and Citrix server.
- Unable to access admin shares on the file server.
- SMS remote desktop from Vista to XP prompts for credentials if it has the patch installed
- Issue started after 968389 patch installation.
- Interesting point to note - this problem is only evident on some servers whilst some are not being affected at all.

This issue is there when you access the admin shares or c$ on the server itself:
Error messages
\\localhost\c$ - No network provider accepted the given network path
\\servername\c$ - No network provider accepted the given network path.
\\ip\c$ - No network provider accepted the given network path.
\\FQDN\c$ - No network provider accepted the given network path

RESOLUTION/WORKAROUND
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Uninstall and reinstall the patch will guarantee solve the problem