Click Start, type msconfig.exe in the Start Search box, and then press ENTER.
After you have finished troubleshooting, follow these steps to reset the computer to start as usual. Now install the game in Windows XP compatibility mode and check. This section allows you to add, remove, or edit different configurations.Click Edit (the wide one at the top, not the smaller one below), Add, and name your configuration whatever you want. Go to the tab labeled Game Configurations.ConfigurationHammer allows you to setup multiple configurations, so if you want to make maps for more than one GoldSource game, you can make maps for each on the same editor.
(Steam will call it ' Half-Life SDK'.) Click on Tools, Options.