Short Answer 
To fix ‘System error 5 has occurred. Access is denied’, run Command Prompt as an administrator, ensure you’re logged in with an account that has administrator rights, and consider adjusting User Account Control settings to prevent interference with command execution.
Run Command Prompt as Administrator
To resolve the ‘System error 5 has occurred. Access is denied’ issue, start by running the Command Prompt with elevated privileges. You can do this by locating the Command Prompt icon, right-clicking it, and selecting ‘Run as administrator’. This will grant the necessary permissions to execute the commands without triggering access denial.
Log in as Administrator
If you are not logged in with an account that has administrative privileges, you will likely encounter this error. Try logging into your computer using an account that has administrator rights. If you don’t have access to such an account, it may be necessary to contact your system administrator for assistance to gain the required permissions.
Adjust User Account Control Settings
Sometimes, the issue can stem from your User Account Control (UAC) settings blocking certain commands. You can adjust these settings by navigating to Control Panel > User Accounts > Change User Account Control Settings. Lowering the UAC slider may help prevent it from interfering with command execution that requires higher privileges.