Game freezes if I try to make my sims do anything

@JupeMies  Most of a dxdiag is in English or the language of Windows, regardless of the language of the system, and yes, everything is in the same place in any language.  So I can read or figure out everything important even if I don't know a word of the language.

What your dxdiag shows is that your computer doesn't have any obvious issues that would explain why this save isn't running properly.  So I think it is the save, but that doesn't mean the save itself is unusable.  One thing you can try is moving your main household to a different lot.  Once you've done so, use "save as" to rename the save, quit, reload, and see how the household runs.

Please also try playing a different household within the same save, for comparison's sake.  Let me know the results of both tests, and we can go from there.