Encrypting your documents with passwords can prevent other users from opening or modifying them. This step-by-step guide describes how to set (and remove) a password for documents in Word, Powerpoint and Excel 2010.

To set password for document:

1. Open your document.

2. Go to File->Info->Permissions->Encrypt with password.

3. Provide your password in Encrypt Document window and hit OK.

4. Re-enter your password in next step and then hit OK.

5. Save your document. Your document is now password-protected.

To remove password from document:

1. Open your document.

2. Provide the password to access the contents.

3. Go to File->Info->Permissions->Encrypt with password.

4. Erase the password in the field and hit OK.

5. Save your document.