Whenever I try to switch to Fullscreen on Halflife regardless if it is software or OPENGL or using the MiniGL the screen will go black. The only thing left to do is reboot (which ticks me off). I managed to make it run _once_ at 640x480 and it worked perfectly but when I switched back to the menu an tried to switch back the same thing happened. So I tried to run the game in a window instead and it works except for the open and MiniGL modes.
 
If there's anyone who have had this issue and fixed it please let me know cause I really don't know what to do. My system
K6-3 400Mhz on a MVP3 mobo (SOYO 5EHM), 128Mb RAM PC100, V3 2000 AGP, Diamond MX300 I'm running Win NT4 with SP6a and latest 3dfx drivers and Half-life ver 1.0.1.6 (retail version not warez)
 
I'll be thankful for any kind of help.