Edited wrongly Registry entry and lost access but now want to regain access.

I recently resetted Win 10 to default since I forgot to delete 2 malwares at one instance and on the other got stuck windows OS. After reset, usb keyboard not working and usb not allowing driver update. so i wanted to do a https://stackoverflow.com/questions/13267236/how-disable-and-enable-usb-port-via-command-prompt. It requires https://docs.microsoft.com/en-gb/windows-hardware/drivers/devtest/devcon and command prompt wont recognize for run. This required me to install https://docs.microsoft.com/en-gb/windows-hardware/drivers/download-the-wdk. This install gave me message that the following file doesn't allow access to the SDK installer.

Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{6069BBFB-987E-4532-A065-D424F2CED667}\InprocServer32

so i ran regedit in run and got into the registry editor as administrator and entered to the above file and viewed the security tab. There I denied access to the unknown user in the user groups and applied and hit OK. Then a warning of allowing some as  Full access and others as deny will overwrite access into deny. I clicked OK. But immediately i am warned that i dont have view access but can do modify. however when i go to security tab ans see there is no entry in the user groups. If i add Administrators or Users and give full access, it is not giving permission to make changes. How can I get back access? How can I re-enable USB keyboard?