Problems with GMOD - Strange icons appear

Hello everyone, and thank you for seeing this message.
Just recently, I started having trouble with the latest version of GMOD. Every time I start the game, everything runs just fine, but after a certain amount of time, the font of the game apparently crashes(or something like that).
Here are some screens which indicate what my problem is:

Here are my System Specifications:

Operating System: Windows 7 Professional 32-bit (6.1, Build 7600) (7600.win7_rtm.090713-1255)
System Model: Inspiron 1525
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A16
Processor: Intel® Core™2 Duo CPU T5750 @ 2.00GHz (2 CPUs), ~2.0GHz
Memory: 2048MB RAM
DirectX Version: DirectX 11
System DPI Setting: 96 DPI (100 percent)
DxDiag Version: 6.01.7600.16385 32bit Unicode

------ Video Card ------
Card name: Mobile Intel® 965 Express Chipset Family
Display Memory: 358 MB
Current Mode: 1280 x 800 (32 bit) (60Hz)
D3D9 Overlay: Supported
DXVA-HD: Not Supported
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled

I know my laptop is’nt the best, but its good enough ^^’
My Drivers are already updated to the latest, and I am running a legal version of GMOD. Also, I do not have any hacks of some sort, just a normal version.

Could be overheating, I’d check temps with HWmonitor when this starts to happen.

Im sorry…

No it’s not.

You should try reinstall Garry’s mod maybe

With all the pirates around, don’t get offended but…
Did you download this off steam?

Well, thank you for your replies. : )
I have checked what my temperature was, before it happened, and it was around 75 degrees Celcius (167 Fahrenheit). Thats like 30 degrees Celcius more than normal, so I guess that could be a factor.
I will try reinstalling GMOD, but I think the core of the problem lies in the installation of the SGmod, because every time this happens, I am building with Stargate’s and stuff.
By the way, it is not a pirated version, completely legal, payed & downloaded via Steam ; )

Thank you all for your messages ^^
Have a nice day!