BUG REPORT:
I have been able to identify the suspect for the computer issues. The computer and its firmware, operating system, applications etc. are up to date so those can be ruled out as a source for the trouble.
Windows 10, Adobe Reader continuous release version 2023.006.20230

Symptoms: Adobe reader freezes, other applications freezes as well, and crash (for example MS Teams, Excel, Outlook). This happens several times a day when opening some specific files with Adobe reader.

And the complex file name causes this. Exact copy of the same file but with short and simple name does not cause issues.

I have named the standards downloaded from the national standards online library with descriptive name. I have copied the title from the content and pasted that as a file name:
problematic name:
SFS-EN 61508-3 Sähköisten elektronisten ohjelmoitavien elektronisten turvallisuuteen liittyvien järjestelmien toiminnallinen turvallisuus. Osa 3 Ohjelmistovaatimukset.pdf

And it works with simple name: SFS-EN 61508-3.pdf

So the problematic file name has several characteristics, that are not taken into account in Adobe's quality control (software testing):
- long file name
- file name contains Scandinavian letters

Feel free to repeat the problem, and run appropriate dynamic analysis tools and debuggers to spot the memory leak in the product code. And please fix it, and release a patch for the bug fix. And for the sake of quality, perform root cause analysis and fix the errors in the design phases and documents, there must be lots of similar bugs clustered.