computers unable to access internet

Lenovo G460 laptop computer - 06779xu...
August 29, 2017 at 11:47:50
Specs: Win 7 Home Professional, 2.5/6G
We have 3 computers in our lab of 30 computers have lost the ability to access the internet. 2 of them have unknown devices code 43 errors in device manager, but message says correct drivers are already installed,and the other pc has no problems device manager showing up. No new hardware has been added to any of them. The 3 pc's are connected to different hubs. I have updated all 3. Any suggestions appreciated, thanks

vandal67


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#1
August 29, 2017 at 13:21:49
I don't think we should necessarily assume these three problems are linked.

Have you tried Uninstalling the drivers from Device Manager then restarting the system? This will setup the drivers again. If it asks about removing "software" don't let it, otherwise it is OK to ignore the warnings.

Always pop back and let us know the outcome - thanks


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#2
August 29, 2017 at 14:30:02
Thanks, Derek, I'll try that and let you know.

vandal67


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#3
August 30, 2017 at 01:14:36
Does the Ethernet adapter show "Enabled" or any abnormal state?
Does "ipcanfig" show IP assignment to the Ethernet adapter?

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Related Solutions

#4
August 30, 2017 at 07:41:57
Re #3

I see a little typo - the command is ipconfig

Always pop back and let us know the outcome - thanks


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#5
August 30, 2017 at 10:09:43
Ethernet adapter is enabled. Ipconfig shows media disconnected.

vandal67


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#6
August 30, 2017 at 10:17:08
Network adapter driver says it is up to date. I also uninstalled/reinstalled the network/ethernet adapter. but did not solve problem.

vandal67


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#7
August 30, 2017 at 11:44:45
Is there any time (day or night) that you can power off the router(s) for about half a minute? If so it might be worth a try.

Always pop back and let us know the outcome - thanks


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#8
August 30, 2017 at 11:54:37
From my original post, the pc that did not have unknown device code 43 error is up and running again. Its problem a router connection problem. The pc I'm working now was reset to factory defaults. Under device manager, the unknown device code 43 error exists under USB Controllers, and no network adapter is available in device manager.

vandal67


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#9
August 30, 2017 at 12:30:35
Re #8

Just out of curiosity does the WiFi adapter (if any) show on that one?

It could be a hardware fault because Windows ought to pick it up during booting.

Always pop back and let us know the outcome - thanks


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#10
August 30, 2017 at 22:45:25
You can purchase NIC cards for fairly cheaply, disable onboard NIC and install the replacement cards with drivers. This would solve any hardware issues and since it would use a different driver would likely solve software issues also.

You have to be a little bit crazy to keep you from going insane.


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#11
August 31, 2017 at 00:45:02
Have you changed/exchanged LAN cable?

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#12
September 5, 2017 at 11:51:12
I have tried different LAN cables to no avail. I downloaded the driver for Broadcom NetXtreme Gigabit Ethernet and installed it on the pc, but did not help. There is still an unknown device with a yellow triangle under USB controllers in device manager. Windows has stopped this device (Code 43). Also says best driver for this unknown device is already installed. I don't know if the unknown device is affecting internet access or not.

vandal67


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#13
September 5, 2017 at 21:51:28
Go to system manufactures site for complete systems or component manufactures sites and download all drivers and install them generally starting with chipset drivers (unless there is a note to install a articular one first).

You have to be a little bit crazy to keep you from going insane.


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#14
September 6, 2017 at 10:25:17
I can't access the internet on the pc in question.

vandal67


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#15
September 6, 2017 at 10:35:59
Ensure you have your make and model number then download them as Files and Save them on another computer (without running them). Transfer them to this computer using a flash drive. Most likely you double click the files to install them.

Always pop back and let us know the outcome - thanks


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