Thanks, but I tried that and it didn't work.
Either way I reinstalled Half life 2 and it fixed the problem, but what i'm paranoid of now is if I play Deathmatch that i'm gonna end up with the same problem in hl2.
When it happened the first time I checked sv_gravity and all the "phys" values...
So back in the day I used to be a massive Half life 2 player, and now that I have a new PC im back playing Deathmatch (alot) and Half life 2....but what has been pissing me off for the last week is that after playing a killbox match in low grav on deathmatch, Hl2 keeps running in low gravity...