Recently bought a laptop, put office, but some files ppt and pptx open. If I click on the presentation, I receive a message that the file is not a Win32 application. What can be done about this?

Depends on a lot of things. Maybe it is not a valid PowerPoint document. Also, if you use a Crack for the office it might have unexpected effects.

Confirm that it a valid PowerPoint document

ShayWallace:
Recently bought a laptop, put office, but some files ppt and pptx open. If I click on the presentation, I receive a message that the file is not a Win32 application. What can be done about this?

Looks like your powerpoint document was temporarily crashed and in that moment you lost your pages. I would suggest you Microsoft PowerPoint Software - IT specialists from MS, created it especially for hard cases with presentations, it is more effective than Open&Repair function that built-in in Application.

Powerpoint recovery, follow the below mentioned steps:

1. Click File, then choose Save As.
2. Save the PowerPoint file at a new destination with the same or a new name.

http://microsoft-powerpoint-repair..ru/2013/01/recover-corrupt-ppt-pptx-and-pptm.html
https://powerpoint.recoverytoolbox.com/