Very high latency when playing Counter Strike Source

Im always getting 1000+ latency when i join servers, even servers in uk . Im using virgin media 20mbps line, with no one else using the connection.

I can download at 2+MB/sec but get 1000+ latency?!??!??!!

my laptop specs are: c2d 2.53Ghz
4GB ram
9800gt 512MB
250GB hdd with 42gigs free

i've closed all apps that use internet (except bitdefender)
pretty weird huh?

I have a desktop so it's a pretty big difference when working with a laptop. But I had a problem from going to 30 - 500 latency overnight! I found out that when I directly connect my modem it was 19-20, which is very close to the 20-30 I was getting wirelessly. Come to find out my VGA cord was rubbing against my wireless antenna behind my computer! Everything is back to normal now.

All-in-all, I would suggest first making sure your routers ports are opened for whatever you are trying to do. Then make sure your wireless routers is centralized in your house away from ANY and I mean ANY! metal. I had a little fold chair next to my wireless receiver and it was interfereing... Then of course make sure your fire wall is set up to allow any connections. But it rarely ever has anything to do with the latency. After that go to your technical support trouble shooting for networking.

Good Luck!