I'm also having trouble.

When I try to enter the command manually I get this error:
"C:\Windows\system32>bcdedit -set {ntldr} device partition=C:
An error occurred while attempting to reference the specified entry.
The system cannot find the file specified."

When I copy and paste from the forum I get this:
"C:\Windows\system32>bcdedit -set {ntldr} device partition=C:
The specified command line is not valid.
Run "bcdedit /?" for command line assistance."

Any ideas?