ethernet trouble

Question

i have a really weird ethernet trouble, so when i first boot my pc the network is shown as not identified and has a little yellow triangle so when i reboot my pc in safe mode and then i reboot it again network is working completly fine, i tried using a new NIC card but i still got the yellow triangle

im using a dell optiplex 790 and windows 10

Answer 1

Hi Gabriel

My name is Andre Da Costa; an Independent Consultant, Windows Insider MVP and Windows & Devices for IT MVP. I'm here to help you with your problem.

I noticed there are no Windows 10 native drivers for this model computer, so, there might be compatibility issues.

In the meantime, here are some things you can try:

Press Windows key + X

Click Power options

Click Additional power settings under Related settings

Click Choose what the power button does

Click Change settings that are currently unavailable

Uncheck 'Turn on fast startup (recommended)

Click Save changes.

Click Restart now and see if it works.

If that does not work...

Open Start

Type: cmd

Right click CMD

Click Run as administrator

At the command prompt, type:

ipconfig /flushdns

ipconfig /registerdns

ipconfig /release

ipconfig /renew

NETSH winsock reset catalog

NETSH int ipv4 reset reset.log

NETSH int ipv6 reset reset.log

Hit Enter

Exit the prompt then restart

Open Start > Settings > Update & security > Troubleshoot

Scroll down

Click Network adapters

Click Run the Troubleshooter

When complete, restart to see if the problem is resolved.

If not, press Windows key + X

Click Device Manager

Expand Network adapters

Right click your adapter

Click Uninstall

Exit Device Manager, restart. Windows 10 should detect the network adapter then reinstall it. Check if you can connect and browse.

also try:

Open Start > Settings > Network & Internet > Status

Scroll to the bottom then click Network reset.

You might want to try swapping out your CAT5 cable to see if it makes a difference.

Disable Energy Efficient Ethernet in "Client for Microsoft Networks"

Press Windows key + X

Click Device Manager, expand Network Adapters, right-click the adapter > Properties > Power Management, and then clear the Allow the computer to turn off this device to save power check box.

If you don't have that option, see other ways to disable it:

https://blogs.technet.microsoft.com/exchange/20...

If the network connection is slow or lagging, check if Windows 10 is downloading Windows Update or the Microsoft Store is downloading updates. These can sometimes affect the performance your network connection.

If you have a VPN enabled, disable it.

Disable the Windows Firewall then try connecting.

If the connection is slow, remove any special bundled software that came with the motherboard.

Answer 2

Hi,

You might try turning off Fast Startup... It might be causing a problem with the driver installing...

The easiest way to tell if this is the problem is to turn it off and see what happens.

This feature only works when you do a SHUTDOWN and then Boot.

It doesn't effect a RESTART.

To turn it off or on...

Go to Control panel...Power Options, and select Choose What the Power Buttons Do on the left.

Then select Change Settings That Are Currently Unavailable near the top center of screen...

Lower down on the window, uncheck Fast Startup.