I was working with my presentation during some hours yesterday evening

[maddisimpson]

I created about ten new slides into my presentation. Today couple of hours ago I've attempted opening my .pptx, and PowerPoint viewed - POWERPOINT.exe has generated errors and will be closed by Windows. You will need to restart the program. An error log is being created. Now I'm searching for any way to fix corrupt powerpoint software data. I used some instruments, but it proved useless.

[MattWh]

Please try below article to make older presentation compatible with new versions of PowerPoint and check if that fix the problem.

https://support.office.com/en-us/article/Make-a-presentation-compatible-with-older-versions-of-PowerPoint-7f2f31e2-d4dd-4c1f-9e27-ba6fadf92d44

Another good link:

http://www.pptfaq.com/FAQ00916_PowerPoint_won-t_open_my_older_PowerPoint_presentations.htm

https://www.fixtoolbox.com/powerpointfix.html