2. Video DriversThe NVidia drivers that come with XP do not allow you to run Half Life in OpenGL. Update to the newest drivers.Despite the fact that they are not official drivers, 22.50 was the only set which worked
3. Sound DriversUse windows update to update Creative drivers.
4. Fixing screen flickerWindows XP defaults to 60Hz for games. A fix is available here:CODEhttp://www.fileplanet.com/dl/dl.asp?/planetquake/ztn/nvreffix-setup.exeSelect "set: ev ery resolution to monitor's maximum supported rate"
5. Fixing lagIf you are having trouble with lag, try disabling the windows XP firewall. Go to control panel>network connections. Select connection, right click, properties, advanced, untick the firewall.
6. MouseYou can improve your mouse smoothness for games.Control panel>mouse>hardware>properties>advancedChange the sample rate to a higher one, eg. 200