새로운 미용실을 가다.

Using secedit

summary

1. Export a configuration
• secedit /export /cfg C:\securityconfig.cfg
  
2. Modify the configuration
3. Import the configuration
• secedit /configure /db C:\Windows\security\new.sdb /cfg C:\securityconfig.cfg /areas SECURITYPOLICY
  

http://superuser.com/questions/342680/enable-password-blank-run-as-on-home-premium

How to Enable Remote Login via Blank Passwords using Local Security Policy or Group Policy Editor

Security Policies -> Local Securities -> Security Options (for user using Group Policy Editor or GPEdit.msc, expand Local Computer Policy -> Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options). Locate Accounts: Limit local account use of blank passwords to console logon only policy, and set its value to Disabled.

How to Configure Blank Passwords Allowed for Remote Log On via Registry

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa]
"LimitBlankPasswordUse"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa]
"LimitBlankPasswordUse"=dword:00000000

http://support.microsoft.com/kb/180548/en-us

Using LogonUser API , but there are problem in Windows NT , Windows 2000