Here are the minimum and recommended system requirements to run Half-Life smoothly and efficiently without any crash, freeze, slowness etc. on any computer;
Minimum System Requirements:
CPU: 500 mhz processorRAM: 96mb ramGPU: 16mb video cardOS: Windows XP
Recommended System Requirements:
CPU: 800 mhz processorRAM: 128mb ramGPU: 32mb+ video cardOS: Windows XP
Please also have a look at other posts under “System Requirements” category to view & check if your computer system is powerful enough to run other games like Half-Life smoothly.