How to password protect PowerPoint presentation

There are two levels of  Microsoft PowerPoint password protection, one to open the presentation and one to enable making changes to presentation. Let's check both of them.

In the MS PowerPoint presentation you want to protect with a password, click File and choose Save As.

At the bottom of the new window click Tools and choose General Options...

In the General Options window you can now enter two passwords.

The first one, is the Password that the person that wants to open the presentation needs to enter first.

The second is the one that the person that wants to make the changes to presentation needs to enter first.

You can choose one or another or even both of them.

Click OK when done.

If asked to do so, enter the password you chose one again and click OK.

If you chose to have two passwords then enter the second one once again as well.

Click Save.

The next time some one wants to open the presentation they need to enter the password first.

Or if they want to edit the presentation, they need to enter the password.