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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.

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