>I want to map to my home PC from my laptop, but it's asking for the password. The administrator on the PC does not have a password. So, is it the password that was used during setup? I only ever use two and it is not either of those. Where in XP can I set this if it was blank? I know there are utilities that can change them, but I would rather go through the normal means first. Thanks!
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>UPDATE: I tried using MMC to set the administrator password on the PC, but the laptop still will not connect as it won't accept the password. I can connect through my other mappings to drives on the PC, including the C drive, but not using the \\MyPC\c$ syntax. Shouldn't this work?

When it asks for the username and password maybe try \\machinename\username or \machinename\username.
Are you trying to map a drive? Do you have a shared folder setup?