This usually happens because of broken or outdated files, like shaderapidx9.dll, or leftover files from old mods like cheat.dll. Other reasons could be old graphics drivers, missing DirectX files, damaged game files, or custom maps that weren’t made correctly.
1. Check Your System Requirements
Some Source engine-based games require certain system specifications, like a minimum amount of RAM, enough storage space, a DirectX-compatible system, and a supported graphics card (VGA card). It’s very important to make sure your computer meets these requirements before trying to run the game. You can usually find the minimum system requirements on the game’s order page or retail box.
2. Temporarily Disable Your Antivirus/Firewall
Security programs sometimes block the game or add software that doesn’t work well with it. Turning off your antivirus or firewall for a short time can help you see if they are causing problems, like making hl2.exe crash when starting the game or trying to go online. If disabling your antivirus or anti-spyware doesn’t solve the problem, you might need to completely uninstall these programs until an update comes from the software developers. If disabling your antivirus lets the game launch, you may want to reset or reinstall your antivirus software afterwards.
3. Adjust Data Execution Prevention (DEP) Settings
Windows can sometimes stop hl2.exe if it thinks the game is acting suspiciously with memory. To fix this, you can add hl2.exe to a list of exceptions, so Windows lets it run without shutting it down by mistake.
4. Disable Background Applications
Source engine-based games can use a lot of your computer’s resources. If you have many background programs running while playing, the game might crash if it can’t get enough resources.
5. Uninstall and Reinstall the Game
Download the Revo Uninstaller trial from www.revouninstall.com, find the game in the list, and uninstall it. While still in the Revo Uninstaller window, you’ll be prompted to choose how to remove leftover files and registry traces—select “Advanced” and delete any leftovers. After that, reinstall or re-download the game and see if it works properly.
