Again, maybe because it was damaged, I couldn't just load his drive from File Manager. So, I had to do this work around:
First you need to create directory where you can attach windows partition using mount command (for example /media/c for C

sudo mkdir -p /media/c
Now find out list of partition (click on System > Administration > Disks ) or use following command:
sudo fdisk -l
If /dev/hdb1 is NTFS partition. Now type following command:
sudo mount -t ntfs -o nls=utf8,umask=0222 /dev/hdb1 /media/c
To unmount Windows NTFS partition type command:
sudo umount /media/c
End result - it took TEN HOURS to back up his stuff onto an external hard drive I had attached to the system. Once I got him a new hard drive and loaded WIndows 10 onto it, it took less than five minutes to copy it all back. But boy, was he happy.