Windows 7 Networking
Open your registry editor. Start > Run > regedit
If you’ve actually opened your registry editor, please navigate as follows:
HKEY_LOCAL_MACHINE > SYSTEM > ControlSet001 > Control > Lsa
Find the registry key labeled “LimitBlankPasswordUse” and change the value from 1 to 0.
Then you’ll need to repeat the above steps using the following registry path as well:
HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > Lsa
Again, change the registry key “LimitBlankPasswordUse” from 1 to 0.
That it, we’re all done. Now make sure that this computer’s user account doesn’t have a password set (Control Panel > User Accounts > Remove your password).