NEW PC connects to network but NOT internet

Hello,
i currently installed windows 7 X64 on a new PC, i installed the last updated realtek lan driver and the internet appears to be connected, but nothing works, i can't open any site, i can't use Utorrent or Skype or anything, just nothing works.
sometimes the browser works for just few seconds and it's dead slow, i can't even open google and just in a second it's frozen again.

I also tried this but still nothing works.
1) go to start, type "cmd" in the search bar (without quotes), right click it and "run as administrator".
2) type this: "ipconfig /release" (w/o quotes) and press enter.
3) now type: "ipconfig /flushdns" (w/o quotes) and press enter.
4) now: "ipconfig /renew" and press enter.

If that doesn't solve it, do the following

1) type on the CMD window: "netsh winsock reset catalog" and press enter.
2) after done, type: "netsh int ip reset reset.log" and press enter.

Help please. !!

my motherboard is Gigabyte B85-HD3
I installed Realtek lan driver last version 7.089
regarding your first question, sorry but i don't know that.

first of all, i wanna thank you for helping me an taking so much of your time, i really appreciate it.

OK, it gives me the normal IP 192.168.1.101
the motherboard is
GA-B85-HD3
Intel B85/rev2.0
Socket1150/PCI-Ex16/ATX
Gbe LAN/4 SATA

this may seen weird but i think the problem is in my Router configuration, cause i had this same problem with my cousin laptop once when i tried to connect it with my router.
Also i can't connect any of my smart phones with WIFI network.

P.S: my old PC works just fine, there's no problem at all with the internet (Same wire that i am using now on the new pc)

Ok i found it, it is disabled.