Just today I started getting strange UAC prompts from the program "Network" (with CLSID {E5A040E9-1097-4D24-B89E-3C730036D615}) whenever a network connects (plugging in Ethernet cable, connecting to a wireless network)...etc. It occurs on two Windows 8 machines (both domain-joined).
According to the only thing I found on the Internet (http://www.itproffs.se/index.php?/topic/39631-windows-8-irriterande-uac-fraga-naetverksprofil/, non English content), it seems to be trigger by Set Network Location. Whether approving the UAC request or not seems have no difference. The UAC prompts pops-up next time a network connects.
Has anyone seen this behavior?