Setting a password on a folder can help enhance the security of your sensitive files and documents. Here are the steps to set a password on a folder:

1. First, create a new folder or locate the folder you want to secure.
2. Right-click on the folder and select 'Properties'.
3. In the Properties window, go to the 'General' tab and click on the 'Advanced' button.
4. Check the box that says 'Encrypt contents to secure data' and click 'OK'.
5. You will be prompted to back up your encryption key. Follow the instructions to complete this process.
6. Once encryption is enabled, only users with the correct encryption key will be able to access the folder.

It's important to remember your encryption key or password, as it is crucial for accessing the encrypted folder in the future. Make sure to store it securely and avoid sharing it with unauthorized users.