Common problem, "cable unplugged" error windows 7

Hello dear community

Now i've tried to fix this error myself for countless of days, this quite common problem.

The error is following: My computer now and then doesnt recognize that i've got a ethernet cable plugged in to my computer.
The internet work all times on all of the other 3 computers in the home network.

OS: win 7
NIC: intel r 82566dc-2 gigabit network connection

I've tried to disable IPV6 adress, updated drivers and some other stuff, And when I tried the option to change the link/duplex from auto to fixed it worked. Sometimes it worked at 10mb, then it lost connection to the cable and I changed it to 100/ 1 gig and it work again. And when 100/1gig didnt work i changed back to 10 aso. This worked for about 1-2 weeks. Then suddenly it couldnt find the cable in neither of the options.
So I tried the good old plugg out modem, router + computer and let it be offline for some hours and then put it on again. I tried this several times each day for a week (changed to all varies of duplex each time). Then suddenly it worked again, for 5 hours, then it died AGAIN.
Now ive been cut from the internet for some days on my desktop computer again. Needless to say im getting pretty frustrated.

So after this time I give up, I need you expert help. Do you have any clue what to do?

Best wishes
Simon

Hi Lemur and thanks!

No I have not tried that due to that i'm using a DELL XPS with a integrated networkcard.

Greetz

I already got the newest updates to my NIC

Yes I tried the auto also.

I downloaded the drivers from Intel. I've tried out 3 different drivers, just incase the new ones got baby errors.

I'll post the ipconfig /all, just gonna usb it over to this one. Brb!

Windows IP Configuration

Host Name . . . . . . . . . . . . : ZAPHOD
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82566DC-2 Gigabit Network Connection
Physical Address. . . . . . . . . : 00-1D-09-23-A9-7D
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{9B0C5589-C7A9-48BF-A7E9-3B1914F18A8B}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 9:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

I don't got a wireless adapter.

I'll try that, i'll messege it back here with the results when it's done.