Passwordless access to LAN shared folders

Start running gpedit.msc
1. Computer Configuration - Windows Settings - Security Settings - Local Security Policy - Security Options - Network Access: Do not allow anonymous enumeration of SAM accounts and shares.
Set to disabled
2. Computer Configuration - Security Settings - Local Security Policy - Security Options - Accounts: Local accounts with blank passwords are only allowed to log in to the console.
Set to Disabled
3. Control Panel - User Accounts - Guest Account
Set to Enable
4. Computer Configuration - Security Settings - Local Security Policy - Local Security Policy - Security Options - Network Access: Sharing and Security Mode for Local Accounts
Set to Guest Only - Local Users Authenticate as Guest