Counter Strike Source Help

Okay, so I had this computer, and CSS worked perfectly on it, but then, I changed it with my dads computer which, hardware wise is better.
It has better graphics, faster proccessor, etc.
Anyways, they were connected on the same network.
So after I changed them I installed Steam, and CSS.
But here’s the thing, IT LAGGS.
And I don’t know how to fix it, I have no clue what the problem could be, I mean it worked better on my old shittier computer….
So what’s the deal?
Thanks to anyone that tries to help!
Answer #1
It may be the firewall blocking steam or cs itself, check anti viro firewall and ur defoult system firewall if u have one, u have to have an exception maked (allow traffic or smthing like this) for net using aps. Don’t know if its it but only this came to my mind.
Answer #2
Try entering the console and entering:
cl_cmdrate 5
cl_updaterate 5
rate 20000
Answer #3
I don’t know, I tried everything, its still slow, I have Bitdefender as my AV/IS, and its allowed, and I’m running Windows Media Center 2005 SP2
Answer #4
is ur gfx card temp running hotter then before ? cause thats a similar type of problem i have atm.
Answer #5
Are you talking lag while playing single player or online?
Answer #6
@ : What do you mean?
I have no clue how to see that, or figure that out… sorry… :/
@ : I’m talking about online play, like the settings that I set in CSS for the video are really low, like the resolution and stuff.
But bitdefender, has that little File Zone + Net Zone graph at the bottom of my desktop, and it tells me how much usage is going on, and the Net Zone is usually always full, especially when I download stuff, and it was never like that on my old PC, even though it’s on the exact same network, just a different wire, now the wire is kind of damaged I think, could that be it?