Doesnt look like you've got much wriggle room. You need to trim anything you can. Run Disk Clean-up (Right-click the drive in windows explorer, properties, Disk clean up) and clean up system files. Create a 2nd partition on Disk 2, as big as possible, once you've got rid of some data. Move as much data as you can into that. Then increase its size to at least 900 GB, then move more data. The data you move, must not be linked to programs that depend on them being where they are. So move Documents, Pictures, video's etc.
Macrium reflect, should allow you to do all of this.