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Symptoms

This article applies if all of the following is true.

What's going on?

Windows User Access Control (UAC) treats members of the Administrators group as standard users. Mapped network drives–especially those created with logon scripts–may be expecting a different authentication level. This can cause programs to fail to see mapped drives.

A full description of this issue can be found on Microsoft Technet.

http://technet.microsoft.com/en-us/library/ee844140(v=ws.10).aspx

Resolution

Disable UAC or follow the steps in the TechNet article above.