Can't start up

I need some help. I’m on a laptop, and decided one day to start up Gmod. The problem is, I can’t seem to get past the first loading screen, you know, the one with the cone on gman’s head. I’ve tried all the suggested solutions, such as restarting steam, and all my drivers are as updated as I can get them. Any ideas of whats causing this problem, or how to fix it would be greatly appreciated.

Edit: I should also mention that this is a first start up, it’s completely vanilla.

have you tried every game? half life 2? all the source games you have that are needed for gmod to run?

PC Specs. We need them.

First, I have the orange box. I bought them seperately, but that doesn’t matter. They all startup and run fine. I’m running on a laptop, with an Intel core 2 duo @ 2.66, an nVidia 9600m GT, and 4 gb of RAM. Sorry I didn’t include in the original post.