the sims 2 annoying glitch! help? :(

[thesimsgirl]

There's a small glitch in my Sims 2 Double Deluxe (ex: I click a couch where I want my sim to go, and then the thing pops up and right BEFORE I try to click on "sit", it quickly disappears) and I've tried reinstalling the game and that didn't work. I even tried 'system restore' in my computer and then installed the game again, but that didn't work either! I don't know what to do! can someone help me?!

PLEASE?!