Please do as follows to restore your C: drive data(assuming the computer with your C: drive is computer A):
1. Find another computer(Computer B) with Windows & DataNumen Disk Image installed.
2. Unmount the disk from computer A and then mount it to computer B.
3. Use DataNumen Disk Image to restore the image back to the mounted disk/drive.
4. Unmount the disk from computer B and then mount it back to computer A.
5. Start computer A.