Try running it with absolutely no addons installed, because to me, that “etc.” could be what’s causing your problem.
I have heard that the Aperture Science Handheld Portal Device SWep can cause a long load time, something to do with the portals. Do you have that, perchance?
Personally, my Gmod loads up much faster since the update. I haven’t been playing since about 1-27 or 1-28, though.
And I wish I had your PC. Mine runs gmod okay, though. You have generous parents. I had to buy my own PC (of course, I could have spent more on it, but I needed a laptop, not a desktop, and I really didn’t want to spend $3000+ - I got this when the Q-cores had just come out, and a 6600 was about $1000 just by itself)
AMD Turion 64X2
1GB DDR2 (533)
Nvidia GeForce Go 7300 128MB(which there are no driver updates for - damn you Nvidia :argh:)