Hi everyone!
So I thought it would be a good idea to update my drivers, and since then I didn't manage to display a game correctly
Here's the rundown;
Graphics Card
ATI Mobility Radeon HD 4200 Series
AMD Catalyst Driver Version, and Driver History
8.960.0.0, from Advanced Micro Devices, Inc.
Operating System
Windows 7 64 bits version 6.1.7600
Issue Details
There seems to be many missing polygons. I saw this on Team Fortress 2 and Torchlight. Here is an image from Torchlight, you can clearly see it on the wolf's paws. I played in the settings a bit, and it happens no matter what I change.

Motherboard or System Make & Model
DELL 090DNY
Power Supply
Not sure what that is, would this be helpful?

Display Device(s) and Connection(s) Used
It's a notebook.
Applications and Games
Team Fortress 2 and Torchlight. I just launched Puzzle Dimension and it's missing polygons too. I took a screen for the sake of it

Those squares are supposed to be full.
CPU Details
AMD Athlon II Neo K325 Dual-Core Processor
x86 Family 16 Model 6 Stepping 3. Dual Core I think (it says Core Per Package : 2)
Motherboard BIOS Version
A02
System Memory Type & Amount
2048MB(Speed 1333)
Additional Hardware
Disk Drive : WDC WD25 SATA DISK Device (232GB, IDE)
Nothing is plugged to the laptop, not even a mouse.
Additional Details
I occasionally run CCleaner on it. I installed Glary Utilities to see what were the components. That's about it.
Thanks for the help!