Can't connect to \\hostname\C$ as Administrator - Windows XP Community - XPHeads. Enable Mapping to \\Hostname\C$ Share on Windows 7 or Vista. Just about everybody knows about the hidden administrator C$ share that is always built into Windows file sharing, but you might have wondered why you can’t use that in Windows 7 or Vista.
The reason this doesn’t work is because of UAC (User Account Control) that Vista is (in)famous for. By default Vista doesn’t allow UAC elevation over the network with a local user account. There’s a registry key that we can use to change this behavior to work the same as Windows XP. This will make your computer less secure, and I can’t recommend that you do this… but it’s also good to understand how Windows works. PsKill v1.12. PsExec v1.94. Por Mark Russinovich Publicado: enero 4, 2008 Introducción.