Whenever I'm in my game, it will hang for a few seconds and then it will automatically shut off.
I used to be able to play the game for hours and it won't crash at all!
I didn't touch the game for a few months and recently when I tried to play, it would crash! :(

I've tried:

1. uninstalling and installing but there's no use!
2. running ONLY Sims 3
3. deleting+uninstalling all my other games to improve the memory
4. scanning my entire system for any viruses
5. googling for help and trying all means

BUT IT'S STILL NOT WORKING! :(
I'm at my wits end and I can't find a solution!
Please please please someone help me!
This is my system information:

Windows edition
Windows Vista Home Premium
Service Pack 2

System
Manufacturer: Acer
Model: Aspire 4736
Rating: 4.0
Processor: Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz 2.53 GHz
Memory (RAM): 4.00 GB
System type: 32-bit Operating System

Thanks!! I'll totally love you if you can help meeeeee!