How can I password protect or encrypt a folder in Windows 10?

As far as I know, you can encrypt a folder with password in Windows 10 with EFS (Encrypting File System).

Step 1. Enable Encryption on the Folder

• Right-click the folder you want to encrypt → Properties.
• Click the Advanced button.
• Check the box: "Encrypt contents to secure data" → Click OK.
• Click Apply.

Step 2: Choose Encryption Scope

A pop-up will ask "Apply changes to this folder only" or  "Apply changes to this folder, subfolders, and files". Select the second option for full protection → Click OK.

Step 3: Verify Encryption (Green Text in File Explorer)

Encrypted files/folders will now appear in green text in File Explorer. Only your user account can open them.

Step 4: Back Up Your Encryption Certificate (Critical!)

Windows may prompt you to back up the key after first encrypting a file. Click "Back up now" and follow the steps to save the .PFX file securely.

If you don't back up the certificate and your Windows account is corrupted or reset, you'll lose access forever.

Step 5: Accessing Encrypted Files on Another PC

To open EFS-encrypted files on a different PC or user account:

• Transfer the .PFX certificate to the new PC.
• Double-click the .PFX file → Follow the import wizard (enter the password).
• The files will now be readable.

EFS is one of the easiest ways to password protect a folder in Windows 10 or Windows 11. Let me know if you need more help!