How you go about this will depend on the software you're using to create the file in the first place. Some applications have password protection features built in, while in other cases you'll need ...

You probably already know how to password protect your computer, locking out other, but if you know how to password protect folders you can safely let others use your ...

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This is particularly true if you allow multiple people to use your computer. For your most sensitive files, it's a good idea to create a password-protected folder, for an extra layer of protection.