Apologies if this warrants a new thread, but since this is related to this issue, I thought I should post here first. Please bear with my explanation as English is not my native language.
So, I'm on Windows 7, and I received this same 80248015 error earlier today when trying to update MSE. Upon opening Windows Update I was unable to get updates because 'the service is not running'. I panicked, since viruses seem to do the same thing, which is shutting down Windows Update first to prevent patches. Looked up solutions online and found one that involved renaming the SoftwareDistribution folder to softwaredistribution.old. After I did so, Windows Update started working again, so I thought it was a corrupt SD folder after all.
I then tried to update MSE definitions again, and it failed with the error code 80242014 instead. I uninstalled MSE, then installed the latest version of it. The initial download of the definitions worked just fine - however, after a restart, the 80242014 error returned when I tried to force a definition update. I also cannot seem to enable the option to get updates for Microsoft products outside of Windows, even after opening the related go.microsoft.com page with Internet Explorer; it just returns a fail message.
Did I mess up something big, or is this also related to the expiry date? If I did mess up, is there any way I can revert the changes I made, since I did not delete my old SofwareDistribution folder?