meeeeeee

I just got the Half life game of my friend, and installed the esf mod, i want to try out the game, ive be clicking on Lan game and it keeps on saying it find cant load lidrary (something or over)client.dll this is really pissing me of ;( please help me

i used to be a very good player at the alpha version but i left it from a long time now wheni came back there is the beta i downloaded it , it ran very good at first but i have discovered that after less than 5 mins ALWAYS the game jsut quits and exits everythin and takez me to windowz can u...