On my Windows 7 Ultimate 32bit system, I have changed the following setting:

Local Computer Policy -> Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> User Right Assignment -> Deny access to this computer from the network

This setting was by default "Guest" and I deleted this so that Guest can access a defined network share over the LAN.

But later, I have changed my mind and wanted to return this setting to its default. So I edited that setting and specified Guest. But the setting became MYWINPC\Guest.

So my question is, what is the difference between the previous setting "Guest" and MYWINPC\Guest? And how do I return this setting to its default value, "Guest"?