Seasons keeps crashing on my PC , not MAC . PC

I got the Sims 3 seasons expansion pack about a month ago & didn't have ANY problems with it till 2 weeks ago, I started playing & it was having a problem where my teen Sims couldn't move anywhere. Like I clicked the floor & it didn't say "go here" or anything at all. So I managed to fix that problem. Then 2 days later I was playing & it was perfectly fine then I decided to get off for a few to do some stuff & get back on, as I got back on from my last saved point, my game just crashed on to my desktop. Like most of the users mine did let me continue using my computer but the game kept crashing besides when on create-a-Sim or build/buy mode. So I tried un-installing it to see if it would work then re installed it , but it didn't help. So I un-installed it again & left it un-installed & then my game didnt work because I had things related with seasons on there. So I reinstalled it once again & it was STILL CRASHING. I know is not my computer because it hasn't happened before, I have windows 7 & I have super natural, Monte Carlo, late night & seasons & nothing like this has happened till seasons was installed on my PC. So please make an update or something, because its aggravating me.