Problems with network converting hostname to ip address

I decided to compare the differences between the PC that works with the PC having problems. <br>I found that the working PC did not have IPV6 enabled. So I disabled it. Did not fix. Found that <br>the working PC was using the router as the DNS. So I changed the DNS server on the bad PC.<br>revooted the system and it still had the problems. I then noticed that the bad PC was using the killer<br>ethernet card and the good PC was using the intel ethernet card. So I moved the cable from the killer to the intel<br>network jack. After rebooting the PC it seems to be working. <br>Not sure why. The bad PC has been using the killer ethernet for as long as I can remember.<br>PS both PC have the identical hardware.<br>

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Some how it lost my previous reply. I thought switching from the killer Ethernet to the Intel Ethernet fixed the problem. But
today the DNS problem is back.

If you haven't install latest version of network card driver.

Perform a clean boot state to find out if any one of the startup services or programs causing the network problem.

Perform a Clean Boot in Windows 10 to Troubleshoot Software Conflicts

We are talking about two different network cards and drivers. They both have the same problem. After a reboot the browsers work fine. The next day firefox and chrome are very slow to open a web page. Edge will open the same web page very fast. When firefox starts to open the web page it displays looking up hostname. Isn't the same code that converts the hosname to and ip address used by all browsers? If so why is edge fast and firefox and chrome are slow?
It is difficult to do a clean boot and see if a startup service is causing the problem when it could take overnight for the problem to show up.

I don't know why Edge faster when problem starts have you check your computer for malware infections.

Malwarebytes' scanner
If this program is already installed: Skip the installation and run only the scan!
Download and install: Please download Malwarebytes' scanner to your desktop.

• Double-click mb3-setup-consumer-3.x.x.xxxx and follow the prompts to install the program.
• Click Finish.
• On the Dashboard, click the 'Check for Updates' button.
• After the update completes, click the 'Scan Now' button.
• A Threat Scan will begin. Please allow it to progress through the scanning process.
• When the scan is complete, if there have been detections, click Quarantines Selected button to allow the program to clean what was detected.
• In most cases, a restart will be required.
• Wait for the prompt to restart the computer to appear, then click on Yes.

How to get logs: (Export log to save as txt)

• After the restart once you are back at your desktop, open Malwarebytes once more.
• Click on the Reports tab > Scan Report. (if you have done more than one scan in the past, select the most recent that shows the Date and time of the scan just performed. Press View Report button.
• Click 'Export'.
• Click 'Text file (*.txt)'
• In the Save File dialog box which appears, click on Desktop.
• In the File name: box type a name for your scan log.
• A message box named 'File Saved' should appear stating "Your file has been successfully exported".
• Click Ok
• Find the log on your Desktop and Attach that saved log to your next reply.

(Copy to clipboard for pasting into forum replies or tickets)

I have both avast and malwarebytes installed. No problems reported.