How to protect a directory through Hsphere:

1. Login to Your control panel
2. Click FTP Manager
3. Click File Manager (HtProtect)
4. Click Protect at the bottom

5. Browse to the directory you want to lock, in this case "admin" (click the + through, just like a standard folder tree)

6. Click it of course, this will bring up the "Authentication name or realm" option, you can enter anything you want here. Click Next...

7. This window asks where you want to install the master user file, I usually leave this default. This is important though, you need to create a user. Click "Edit", next to the text

box.

It will say "/.htmaster/.ok_user" could not be found. So click "Create".

8. Enter your username and password, and hit "Save".

9. From this page, just click the disk icon on the left and choose "Save".

Your all done, your directory should be the only one protected with the username/password you have chosen.

NOTE - :   From the window of .htaccess file you can also change the password  for the user.