If your internet suddenly stops working on your Windows 10 computer and you get an error message saying, “Windows is still setting up the class configuration for this device (Code 56)”, then read on as this post will show you what you can do to resolve it. This kind of issue has something to do with the Network Adapter and you can see this error message in the Properties menu of the corresponding Network Adapter under the Device Manager.
This kind of issue could be caused by many things. For one, it could be caused by your VPN connection if you are using one or it could also be due to an outdated driver. Whatever the cause may be, here are some suggestions you have to check out to fix the error.
When you install a virtual machine or VPN software on your computer, a new setup will be added in the Network Connection settings and helps your computer in using that adapter setting each time the VPN is turned on. Assuming that you are using an Ethernet connection but your system is trying to use another adapter or settings, that’s when issues occur and one of them is the “Windows is still setting up the class configuration for this device” error. To fix it, you can try to disable your VPN temporarily and see if the error is resolved or not and if turns out that your VPN is the culprit, you have to uninstall it and install a new one or its latest version. To uninstall it, follow the steps below.
You might also want to update, roll back or disable your Network drivers to fix the “This operation failed as no adapter is in the state permissible for this operation” error.
To run the Network Troubleshooter, refer to these steps:
You might perform a Network Reset to resolve the problem if none of the three given options above worked. This will reset the entire network configuration including your IP address. To perform Network Reset, follow these steps:

Once the device window opens, click once on printers and scanners, and on the right window go to the bottom and uncheck Let windows manage my default printer.
Unchecking that box will let Windows know that we do not wish anymore for him to set our default printers according to their use. Once the checkbox is clear go up to your printer list and click on the printer you wish to use as the default one. I will choose Microsoft Print to PDF as my default printer and click on it. Once the printer is clicked option menu will appear.
When the option menu appears under the printer name, click on Manage which will take you to the printer management screen. When you are on the manage screen, click on the Set as default button, and you are done.
“The remote computer that you are trying to connect to requires network level authentication (NLA), but your windows domain controller cannot be contacted to perform NLA. If you are an administrator on the remote computer, you can disable NLA by using the options on the Remote tab of the System Properties dialog box.”Or you could also see this error message instead:
“The remote computer requires Network Level Authentication, which your computer does not support. For assistance, contact your system administrator or technical support.”Before you proceed in troubleshooting the problem using the options provided below, you need to create a backup for your data or system restore point as well as make a copy of any registry entries you are going to modify.
Error Causes
Choosing default browser in settingschkdsk /f /r
Microsoft’s initial Windows 11 hardware requirements were not really well received by users and they were not really clearly represented from the start making a lot of potential customers slowly drift away from the hype.
It seems that Microsoft has acknowledged this since they have changed their tune about system hardware requirements for the upcoming Windows 11.
It seems that Windows 11 will be able to be officially installed on unsupported computers but with a little inconvenience.
bootrec /rebuildbcd
chkdsk /f /r