Hey, I know what your problem is.
On Windwos XP, the "Users" folder was called "Documents and Settings".
On Vista and 7, Microsoft was worried that by changing the name of a folder which was vital to a lot of programs running correctly, would render a bunch of software broken.
So they used a new filesystem addition (actually an old Unix idea), called the "Symbolic Link".
Symbolic Links are kind of like shortcuts, but they don't actually take up space on the hard drive. (Shortcuts do, albeit a very small amount). They point to other files or directories, and are supposed to be mostly transparent to programs and scripts which might use one.
They can also potentially be a security risk. Since they point to other files or directories on a filesystem (or across filesystems) they can be maliciously employed to give an anonymous user access to system directories (which lack proper ACLs [aka permissions]).
The other problem that symbolic links can cause is known as "recursive linking" or having a symbol link which points to directory above itself in a directory chain. This might not seem like a big deal, but you can witness it being a problem by using that very registry file that you've installed.
That script will recurse down through directories until it runs out of files to change the ownership of. If it came across a symbolic link to the directory above itself, the poorly written script would endlessly loop, consuming system resources, potentially doing damage.
Because of this, Microsoft has made the default security of symbolic links as only being usable by privileged and high-integrity processes. This allows installations made for XP to still work properly on Vista and 7, while preventing wanna-be hackers from "symlinking" a Windows computer, and bad script writers from making Microsoft look bad.
That "folder" you're trying to access isn't actually a folder at all. Its a symbolic link which points to ".C:\Users" on your system. So there's no need to worry about it.
To give yourself access to following synmbolic links, despite the potential risks I pointed out above:
Press Winkey + R
Follow this path:
Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options
"System objects: Strengthen default permissions of internal system objects (e.g., Symbolic Links)"
Change to "Disabled"
Be Warned: Changing this setting makes your computer more insecure. Don't do it unless you know what you're doing.
Careful: The group policy settings are very powerful, so much so you can render yourself locked out of your system.