neoromanempire Are there any special characters in the name you use for your Windows account? This isn't a typical problem with Sims 3, but it could in theory have some effect, and this would also explain why the new account worked.
If you're willing, you could also try moving the location of Documents elsewhere, to see whether the problem is that folder. You could also reverse it after the fact if you didn't want to keep it where it was, whether moving it worked or not. As in, this can be considered an experiment and possibly a workaround, or not, depending on your preference (and whether it helps of course).
The normal way to move Documents is this (option one):
You can also force a new location with a registry edit:
the new location just copied all the folders into a new folder and it kept the originals in my documents folder. I dont even think they're using the new ones.
