Event Viewer is a built-in tool in Windows 8/Windows 8.1, and is responsible for maintaining the logs for all the events and activities that take place in the operating system, when talking about disabling the Event Viewer, it actually means that the Event Log service needs to be disabled.
In order to disable the Event Log service on Windows 8/Windows 8.1, you must follow the steps given below:
Step 1: Using any account that has administrative privileges to log on to Windows 8/Windows 8.1 computer.
From the Start screen, click the Desktop tile.
Step 2: Once on the desktop window, press Windows + R keys simultaneously on the keyboard to initialize the Run command box.
Step 3: In the available field in the Run command box, type the SERVICES.MSC command and press Enter.
Step 4: On the opened Services snap-in, locate and double-click the Windows Event Log service.
Step 5: On the Windows Event Log Properties box, make sure that the General tab is selected. If the service is already running, click the Stop button under the Service status section.
Step 6: On the Stop Other Services box that pops up, click Yes to allow Windows to stop the other dependent services.
Step 7: Once this is done, from the Startup type drop-down list, choose Disabled.
Step 8: Finally click OK to save the changes that you have made, and close the Services snap-in.
Step 9: Restart the computer in order to allow the changes to take effect.