Need help! :/

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System Information
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Time of this report: 10/26/2009, 21:04:15
       Machine name: VAULT-0
   Operating System: Windows Vista™ Home Premium (6.0, Build 6000) (6000.vista_gdr.090805-0102)
           Language: Finnish (Regional Setting: Finnish)
System Manufacturer: FUJITSU SIEMENS
       System Model: AMD690VM-FMH
               BIOS: )Phoenix - Award WorkstationBIOS v6.00PG
          Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ (2 CPUs), ~2.6GHz
             Memory: 2046MB RAM
          Page File: 804MB used, 3499MB available
        Windows Dir: C:\Windows
    DirectX Version: DirectX 10
DX Setup Parameters: Not found
     DxDiag Version: 6.00.6000.16386 32bit Unicode

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DxDiag Notes
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      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
        Sound Tab 2: No problems found.
          Input Tab: No problems found.

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DirectX Debug Levels
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Direct3D:    0/4 (retail)
DirectDraw:  0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay:  0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow:  0/6 (retail)

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Display Devices
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        Card name: NVIDIA GeForce 8400 GS  
     Manufacturer: NVIDIA
        Chip type: GeForce 8400 GS
         DAC type: Integrated RAMDAC


There's my dxdiag, and now i will try my best and explain the problem i have, I think it's rather odd.


When i start up my computer everything works fine.
I start my msn, works fine
I go to forums and read stuff, works fine
I go to TF2 and things go wrong.

My TF2 finds the servers, but i very rarely can connect to any. When i try to look up information it just says "Server not responding" Then i alt+tab to the desktop. my MSN works fine,i'm connected to steam, but for some reason my mozilla can't find any sites.

So my TF2 finds the servers,I'm logged in on steam and MSN but i can't connect to any servers or open up sites on mozilla.

Also, if my mozilla is already running and i have something like youtube open, it loads the current video i have open  just fine but it won't open a new one.

So i'm connected to the internet, but my programs just go crazy.


I updated my windows vista to the newest version, all the drivers etc.


I really need help because i can't play TF2, and i just bought it so i would love to.Huge amount of thanks to anyone who is able to help me or will try, i really appreciate if anyone has any ideas how to fix this :/

EDIT: i also had this problem with CS, but my left 4 dead works fine o.O

Steam is made to use Internet Explorer if my memory serves me correctly.

I will try again today with IE, but I would still have the problem that i can't connect to servers :<