Windows 10: Failed to install driver of WiFi Adapter, And I got message of "Access is denied" and code...

I encountered this problem yesterday, and I found that keys under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vwifibus can't be modified. Meanwhile, HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\vwifibus\Start has been modified to 4. I reinstalled windows 21H1 because failed to fix it. And the WiFi Adapter worked well. But the problem occured again after I installed a windows update and rebooted.

:)

 

MCHBAR read access failed

Hi everyone,


Trying to install TechPowerUp GPU-Z v0.3.8 but i keep getting...MCHBAR read access failed, any suggestions???

 

Code 56 Issue-WiFi Adapter

Hello to the Forum.
My PC has developed an issue with the WiFi Adapter, the Code 56 syndrome?
It came about a couple of days ago when I was attempting to improve the download speeds, I have a reasonable Broadband speed, 65-70 Mbs, but downloads are appalling, so I thought I would start with investigating and upgrading the drivers, I do this on a regularly basis, so I didn’t hold out much hope, still it was a start, I did the Bluetooth driver first.
I have a TP-Link adaptor, so I downloaded the driver from their site and proceeded to install. During the process, I was informed that the existing driver should be deleted first, which was automatic in the installation process. A further message came out, Unable to find your adapter, make sure it is installed, it was, but I could not proceed beyond this point. I checked the Device manager, checked properties, and there was the message. Windows is still setting up the class configuration for this device (Code 56)
A search on the internet cleared showed this to be a problem for which there doesn’t appear to be many successful repairs, the remedial efforts I have carried out are as follows without much success.:
1. Ran the Network Trouble shooter. No effect.
2. Network Reset. No Effect
3. Uninstall VPN. My Virus software had installed a VPN, don’t think it was working but I deleted it anyway. No Effect
4. Uninstall last windows update, the problem occurred about 24 hours after the issue, but there was no effect.
5. There are suggestion that a Clean Install should be carried out and resetting the BIOS but I’m not sure I really want to go down that rout
Further info.
The adapter is not live, ie there is no flashing blue light.
The adapter is unable to identify any networks.
The last recommendation suggested was Restoro?
I would be grateful to receive any help on this matter
Cheers
Jim Windows 10 64bit Version 21H1 OS Build 19043.1081

- - - Updated - - -

Unfortunately, no rescue advice received this time.
Update: Purchased a lower quality adaptor from Amazon Prime, installed last night and up and running now, no problems, thanks to those who viewed my problem

 

Change Folder Destination access Denied

Thanks.

After following the steps suggested, I get the message "Access denied" in command prompt.

Please advise how to allow permission.