Closin’ down the show
As a result of reformatting you may have to reinstall select applications that store settings in locations that were deleted during the reformat. Common candidates for reinstallation include Adobe Photoshop, Microsoft Office, 3D modelling applications, browsers and games with license keys.
When all of this is said and done, you’ll have a fresh install of Windows with new drivers and restored data. Whatever errors that drove you to reformatting will have been banished, and you can enjoy the quick, clean state of a new installation.