Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Lan card auto disconnect & connect.

26 Sep 2015   #1

windows 7 professional 32 bit
Lan card auto disconnect & connect.

Hello everyone,
i am facing the problem of lan card auto disconnect & connect.I have an assembled pc dual core with realtek lan card.Some days before everything was ok.But from 2 days this problem occurred.I googled related to this & found nothing working. Please help...
i am using tenda router & connected 4 others computers also which working fine on this lan cable.Unistalled lan driver installed new from rtl site.
disabled energy efficient ethernet.
disabled shutdown -wake on lan.
reset winsock
reset ipv4
reset ipv6

Attached Files
File Type: txt network.txt (1.6 KB, 1 views)
My System SpecsSystem Spec
27 Sep 2015   #2

Windows 7 Ultimate x64 SP1

When you say disconnecting, does it change to red cross or yellow no internet connection (limited)?

All PCs have dynamic IPs? Any other DHCP server running in the network?

Try a System Restore to a date prior to the issue - System Restore
Is that 2nd DNS server ( working? Run in cmd:
Does it respond back with the IP addresses?
If not remove it.
My System SpecsSystem Spec
28 Sep 2015   #3

windows 7 professional 32 bit
thanks for the reply

its went yellow first & than shows unplugged,sometime in network connection there is no connection of lan card.
I formatted the windows 7 installed a new 1 & checked, found same problem, than i installed win XP & the problem is still there
right now i am using win 7 *64 & no solution.
there is no another DHCP , When i ping to any IP even router IP address its HOST UNREACHABLE.
My System SpecsSystem Spec

28 Sep 2015   #4

Windows 7 Ultimate x64 SP1

If it is still same with both Win 7 and XP, either router needs a factory reset or ethernet card is malfunctioning. Try factory reset (check router manual).
My System SpecsSystem Spec
30 Sep 2015   #5

windows 7 professional 32 bit

Tried factory reset. No solution......On this cable & router its working fine on another computer....
My System SpecsSystem Spec
01 Oct 2015   #6

Windows 7 Ultimate x64 SP1

Try changing MAC Address of the network card with Win7 MAC Address Changer v2.0
Take note of original and then change last 2 fields.
My System SpecsSystem Spec

 Lan card auto disconnect & connect.

Thread Tools

Similar help and support threads
Thread Forum
USB game controller connect-disconnect-connect...
When I plug in my game controller, Windows acknowledges it plugged in (connect sound), then shortly after gives me the disconnect sound. This is where it gets strange... Windows acknowledges controller plugged in. Start a game, controller not there. Exit game, re-enter game, controller...
Hardware & Devices
"Warning, Connection Problem, Auto disconnect in 25 Seconds) in dota 2
i always get this error about > "Warning, Connection Problem, Auto disconnect in 25 Seconds) < every 3 sec .. how do i fix it ? i really want to play dota 2 right now =(
Connect/Disconnect Device
I connect a device, oh let's say an ext hdd or flash to my pc, do my thing (normally xfr files) and when done do the required safe-disconnect procedure. A short while later I may need it again, but I always have to physically disconnect the cable/device and re-connect to get my pc to 'see' the...
General Discussion
Network connect/disconnect over and over
Hello, tonight I installed Windows 7 Service Pack 1. After the installation I see there's a cross over my network connection. But it keeps trying to connect. It's like you plug in cable, disconnect cable, every 5 seconds or so. But it never manages to fully connect. It gets to the state...
Network & Sharing
connect icon on the right corner always show disconnect
hi there, seems that there is a icon error on my network icon on the right corner, i have connect LAN cable properly, i can get the network and go onto internet, networking is fine, but the icon of the network on the right corner always show disconnect (as picture), i know that i'm silly that the...
Network & Sharing

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 20:36.
Twitter Facebook Google+