While installing Windows Services, you may get “System error 5 has occurred” Error or “EOSError Code: 5 Access Denied” Error. This error was due to insufficient permission to run command. The easiest way to run Command Prompt as an administrator is to find the “command prompt” in Search and once you find it, right-click on the “Command Prompt” and then Choose “Run as administrator” to run it with administrative privileges.
Another option is to run in command prompt as below:
C:\net user administrator /active:yes
It is also possible to run netplwiz to solve this error