During the install NS asked me if I wanted to run in 32-bit colour mode and I selected yes, now the resolution seems to have changed (can't tell, settings say 1152x864 still) and I get a max of 60fps, which gives me a headache after half an hours play :/
Please tell me how to fix this short of a re-install of Half Life
*edit*
p4 2.53
1024mb ram
GeForce 4 Ti4600
SB Audigy