@Aggiea wrote:

Windows 7 updater sometimes has to be manually updated, meaning update the updater.

@ Agglea

Is this only for Windows 7? I've still been unable to use the tool provided (here: https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows) to update Windows 8.1, and I'm getting the same problem as when I attempt to get through the Windows 10 update. Which is, simply, that my PC is stuck indefinitely at "checking for updates." Three, four, fives hours will pass with no other result. I know you suggested trying a clean install of Windows 10, but I'm hesitant to do that; I'd have to back up a fair amount of stuff and if it's at all possible, I'd like to avoid the hassle.

When you said "update the updater," how is that done? Maybe that's what I have to do.