The sfc /scannow command scans all protected system files and replaces corrupted and incorrect versions with correct Microsoft versions.
The link below will explain in Microsoft's usual stilted language what DISM is, have fun.
DISM - Deployment Image Servicing and Management | Microsoft Docs
DISM usually involves being used with commands such as the following. (These commands must be run as an administrator in the Elevated Command Prompt).
dism /online /cleanup-image /checkhealth
dism.exe /online /cleanup-image /startcomponentcleanup
dism /online /cleanup-image /restorehealth
I suspect that this problem isn't going to be resolved by using the Windows Repair (All in one) application or by doing a refresh, but doing these things won't do any harm. If you do decide to do the refresh you need to be aware that this will not effect your private files, but it will uninstall any third party programs you have installed.
Did you already have the fitbit app installed on this computer?
Edited to correct spelling and delete incorrect reference to a HP driver,
Edited by dc3, 09 June 2017 - 08:24 AM.