How can I lock a folder in windows 10 with password for restricted access

Windows 10 doesn't have a straightforward built-in password-protected folder feature. The best, safest, and easiest way to keep your files private is to use encryption or third-party tools designed for secure folder locking. Here's a rundown of reliable options to lock a folder in Windows 10:

Option 1: Use Built-in Windows Encryption (BitLocker or EFS)

• BitLocker Drive Encryption:
  You can encrypt entire drives or partitions. (Note: BitLocker isn't available on Windows 10 Home edition.)
• Encrypting File System (EFS):  
  Right-click the folder > Properties > Advanced > Check "Encrypt contents to secure data. to lock a folder in Windows 10" 
  Only your user account can decrypt the files. 
• Caveats: 
   Not password-protecting for other users; it's tied to your Windows login.
   Not foolproof if someone has access to your account or can boot into safe mode.

Limitations: Less flexible for individual folders, more suited for entire drives.

Option 2: Use 7-Zip (Free and Safe for Password-Protected Archives)
Steps:

• Download and install 7-Zip.
• Right-click your folder > 7-Zip > "Add to archive..."
• Under the "Encryption" section, set a strong password.
• Choose "AES-256" encryption.
• Click OK to lock a folder in Windows 10.

Note:  
To access the files, you'll need to extract the archive with the password.
This is a good method—simple and secure enough for most purposes.