After installing my new Windows 2019 server for an Azure Backup Server, I noticed that I now longer have access to neither the Network Card settings nor the MMC console. I was getting a message”

Windows cannot access the specified device, path or file. You may not have the appropriate permissions to access the item.

After little research I found that the solution was a simple one.

1. Elevated the command prompt (CMD) and run gpedit.msc
2. Navigate to Computer Configuration
3. Windows Settings -> Security Settings -> Local Policies -> Security Options
4. Enable “User Account Control: Admin Approval Mode for the Built-in Administrator account”
5. Reboot the server and try again.