UAC Elevated command prompt can't access mapped drives

I came across an issue with UAC today.

UAC had been turned off, but I recently turned it on. I opened an elevated command prompt (RunAs Administrator) and noticed that I couldn't access my mapped drives.

I found the following solution. Create the following registry key and reboot.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
EnableLinkedConnections = 1 (DWORD)

Reference

http://www.winhelponline.com/blog/mapped-drives-are-not-seen-from-elevated-command-prompt-in-vista/