2 things to start with. Uninstall and reinstall to a path different from default program files... For example, try a directory such as HPS and install there.
Then patch - your patches must mostly be installing to a different directory than where the games are.
I think if you get the games patched okay, then all should be okay.
If all else fails, go to the HPS Sims site, contact us page:
http://www.hpssims.com/Pages/Contact/contact.html. You can enter a request for help and Rich Hamilton should get back to you fairly quickly.
This is definitely fixable, just need to work through the specific problem, which I think is your installs and patches.
Rick