So when I'm playing, I get some sort of lag (not due to connection) once every 5 minutes. It takes about 1 second to return to normal.
When I play winamp , that doesnt stutter, so it's quake 4.
When joining a server, I get these lags for about 3 times the first minute and then as described above. Although its not a big thing, its becoming quite annoying. So any suggestions? Thanks in advance :)

Hardware: 3700+ / 6600 GT / SB Live / 1024 RAM