Let's go straight to the point. If you are having the Windows Update error code 802440F in Windows 10, check your system date and time to make sure they are set correctly.
Image showing Windows Update Error Code 802440F
However, after setting your date and time to the appropriate local time and date and you are still experiencing the error code issue it is time to look further for solution. That is when the information within this guide becomes necessary to forestall it in time.
Red indicating Windows + R key
STEP 1: Press Windows + R key to open 'Run'.
Image showing Run dialog
STEP 2: Type or copy and paste services.msc into 'Run' dialog and click on 'OK' to continue.
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STEP 3: Scroll down to 'Windows Update' on the list, right-click on it and choose 'Properties'.
Red arrows pointing to different steps
STEP 4: On 'Startup Type' select 'Automatic' and click on 'Apply' button to make changes.
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STEP 5: Next, Click on 'Start' tab and wait for Windows to execute some actions and click 'OK'.
Image of red arrow pointing to File and Exit
STEP 6: Click on 'File' and select 'Exit' to close the 'Services' window. Next check for updates at the Control Panel.
If you are still experiencing the problem you need to follow this LINK for further help.