If you had installed Windows 8 as dual boot with Windows 7 on your computer and if you use Windows 8 and then boot Windows 7 back then you might find that Windows will check your disk for any error. It will scan and check all of your disks one by one.
Actually Windows 8 is designed to boot fast and shut down faster too by using Hybrid Boot, but actually When you shut down Windows 8 it keep your Windows 8 disk mounted and does not shut down disks. And when you boot into Windows 7 then you will see that it is checking disk for error.
You can make Windows 8 not to use Hybrid Shut Down, for this follow these steps :-
Open your Control Panel and then go to Power Option,
Then on left side click on option saying Choose what the Power buttons do,
Now on next screen click on Change settings that are currently unavailable,
Now you just uncheck the option which says Turn On Fast Startup, that’s it, you are done.