Windows 10 devices come with an inbuilt antivirus solution named Windows Defender.
However, sometimes users face issues while using it.
âAn unexpected problem occurredâ error message may pop up when you try to update Windows Defender.
In case you are facing this issue, then read on and learn how to fix it.
Clean Boot Your PCHere are the steps to follow:Tap the Windows + R hotkey and type âmsconfigâ in the search option.In the System Configuration window, select âService tabâ and click on âHide all Microsoft services.âNow select the âDisable allâ option.After that, click on the âStartupâ button and then select âOpen Task Manager.âWhen the task manager appears on your screen, you can see the startup applications list.Right-tap on the first result and select âDisableâ from the dropdown menu.
Now you need to repeat the above steps for all of the apps  in the list.Finally, you need to close âTask Managerâ and select the âSystem Configurationâ option.