Windows 8.1 Ethernet problem

Dear All

Since a couple of days (started on 14/7/2014) i'm having trouble with my ethernet connectivity, I do not seem to get internet access.

This is what I've tested

pc1 : problem pc
- Desktop (no wireless)
- Windows 8.1 recent updates
- Realtek PCIe GBE family controller
- Driver : 8.32.508.2014 (8/5/2014 Realtek)
- Green en jellow light are flashing

pc2 : tested cable and internet
- Laptop
- Windows 7 no updates
- Broadcom Netlink
- Everything is working fine here, with same cable and internet

pc3 : tested cable and internet
- Laptop
- Windows 7 recent updates
- Realtek PCIe GBE family controller
- Driver : 7.41.216.2011 (16/2/2011 Realtek)
- Everything is working fine here, with same cable and internet

So what did I conclude :
it has nothing to do with the cable
it has nothing to do with the internet
it has nothing to do with the Realtek adapter
it's a new pc (pc1) I put togheter some months ago, worked fine up til now
I can see my network adapter in divice management so it's plugged in correctly

I think it might have to do somthing with Windows 8.1 or windows updates
Any sugestions ? Much appreciated

See some screeshots enclosed (ps my windows is in Dutch, sorry for that)

What router are you using, along with who is your provider (ISP)?

I'm using a modem from my provider Telenet; without any switches or routers in between
model : CBN SVG6540E

Weir thing is that if I check activity of my ethernet adaptor i do send and receive packages (bytes)

From the looks of it. A lot of people have been having issues with that Gateway.

See this thread. http://www.eightforums.com/network-sharing/23608-problems-connecting-network-devices.html

I've tried this just now, but didn't work either.
this is my ipconfig screen (i didn't know what i can show online that's why i hide some numbers)