Vista - How do i Decrease Ping?

Hello
I was playing left 4 dead, and i noticed that my ping was on 350.
I played on 10 different servers, and it was always around 350.
So, i closed up All the unecessary programs and i played again.
Again, 350. So, i was wondering, how do i decrease it?


Is it because it is wireless? Like, my reception is Excellent ~ Good.
My modem is Speedstream 4200, and the acess point is Linksys something.
My internet connection is 8MB Download, 400 Kbps Upload, which is good here in Brazil.

So i was wondering, why so much lag?
And SOMETIMES, when i leave my notebook idle for 1 hour, and i try to browse again, it won't find the page, but it still downloads in uTorrent.
Not only in my notebook this happens , but in all the Wireless Conected.


Note: The acess point is up on the Wardrobe, like 4 Meters up the ground and 10 meters away from me.

Try testing your connection at Speedtest.net - The Global Broadband Speed Test

Use a selection of different servers from around the world (some near and some far). What range of ping times do you get from these?

The latency is 156.

Ping is generally dictated by your ISP. There are a few things you can do.

1- You can disable Auto Tuning
2- Then download TCP Optimizer and manually input the settings you want then reboot
3- Defrag your entire hard dive then reboot and check your results.
4- Complain to your ISP

On speedtest.net use the spinning triangle closest to where you live, then post a screenshot like mine.