[Sims 2] Application has crashed, application will now terminate. Help!

Apologies if this has already been asked and answered, I did search for the problem, but have come up with wildly conflicting answers.

My problem:

* I've only just installed Sims 2 on my new PC (Windows 10). Got the PC about a week ago. Up until today it was working fine.

* I haven't got any CC, don't even have a downloads folder!

* I've deleted the caches and the game still gives this error.

* I uninstalled and reinstalled and it's still giving this error!

I've read that it could be caused by a virus?! But this is a new PC with anti-virus running so I'm sure it's not that.

It can't be corrupt downloads 'cause I don't have any! I only made one family prior to this problem. Other than that, the game was a brand new install, with no new neighbourhoods or families etc.

Help! What could be causing this, and how can I fix it?!