stuttering

[Great Grizzly]

this is odd. when ever i play HL2 DM (only happens on this) every couple minute or so i get this HUGE lag spike. Happens every time on every map, and server. I am able to play other games without a prob. any ideas?

I also think this only started happinening recently....


1.2 ghz 512 pc2100 geforce mx 420 128 cable internet