How can I open the PowerPoint presentation program?

I just downloaded it, but I do not know where to find it on the laptop? For help, I would be very grateful, it will be my first PowerPoint presentation and I have to hold it soon, so have little time and little computer literacy

Well if it is not already installed probably in the download folder. Otherwise, enter in the bar at the bottom left

Although I find the power point file, but when I click on it, comes a list of some ancient files. When I try to open one of them, I do not get to power point either

Then look in the explorer for a powerpoint.exe file