This problem can be solved with the help of various resolutions. Applying every troubleshooting method is not mandatory because only one solution may also assist you.
Make sure the disks (check port and cable) are connected to your system correctly.
1) As it has stuck at scanning and repairing c drive, you should turn off your system right away.
2) Sometimes, the automatic repair mode does not work, thus you need to disable it.
3) Enter Safe Mode and Run Check Disk.
You should recover your data via System Restore.