First of I would like to say I'm not very computer savvy, so bear with me. I recently received a Toshiba Satellite (L645-S4102) with Windows 7. I have all the expansion packs up to apartment life, quite a lot of custom content, and am able to run the game. The issue I have is every once in a while my neighborhood terrain will glitch and I will see a repeated pattern of a picture or wall, etc. I'm wondering if this is due to insufficient hardware or merely bad installation?

Intel® HD Graphics (Pentium)
Driver Version: 8.15.10.2189
Operating System: Windows 7 (6.1.7600)
DirectX* Version: 10.0
Physical Memory: 3893 MB
Minimum Graphics Memory: 32 MB
Maximum Graphics Memory: 1696 MB
Graphics Memory in Use: 50 MB
Processor: Intel64 Family 6 Model 37 Stepping 5
Processor Speed: 2128 MHz

Accelerator in Use: Intel(R) HD Graphics
Video BIOS: 1994.0
Current Graphics Mode: 1366 by 768

I hope this is the information needed and any help would be greatly appreciated, Thanks!

Your problem may be that you do not have a graphics card in your machine. Instead, you have a graphics chip which is probably not designed for games like the Sims. Please read the Game_Help:Onboard_Graphics^wiki FAQ and try the suggestions in that FAQ.

The most important thing to note is that you can destroy your computer by running games which it is not equipped to handle. You can minimize that damage by reducing your graphics settings, using only the earlier EPs, playing for shorter amounts of time, and ensuring that your computer is not overheating.

You can check whether your computer is overheating by following these instructions from simsample:
http://www.modthesims.info/showthread.php?t=441703

Thanks for the help I was kinda thinking along those lines but like i said, sooo not a computer person.