I've been trying to find a fix for 2 days now, and nothing. I bought the Valve Complete Pack the other day and decided to complete all the content included in it by release dates, for the first time on my life (Excluding Portal). I finally got to Half-Life 2. I play it for 30 minutes, and suddenly BOOM. The screen goes black. I move around and hear my footsteps. I also hear people talking to me and so on and so forth. It's just the graphics that glitch out. Basically, after 10-30 minutes of playing Half-Life 2, the games graphics break. I can fix that by either quiting the game and starting it up again, or pressing Ctrl+Alt+Del and then coming back to it, but honestly, I don't feel like getting immersed into a game and after 30 minutes being made to restart/reopen it. I also have problems with texture tearing (Yes, v-sync is on), but they only tear sideways or horizontally.
I have uninstalled and installed the latest drivers for my graphics card. I have reinstalled Half-Life 2 three times. Nothing. Any help, please?
These are my specs (Yeah, my PC is really old, I know):
Nvidia GeForce 8800 GTS 512
Intel Pentium 4, 3.6 GHz (Not sure about the amount of GHz, but something around that number)
1GB RAM
Windows XP 32-Bit
By the way, Portal and all of the other games before Half-Life 2 worked perfectly.