Do you need to access the full, raw disk or just some data (files) on the disk?
If you need to mount the raw disk, I'm afraid your going to need to take the disk out and use a USB external HDD adapter. (search your favourite on-line supplier)
If you just need file/directory data, and if the other computer is up and operational, you can mount the remote disk using the cifs-utils software.
If not installed: "sudo apt-get install cifs-utils"
Create or identify a mount point: "sudo mkdir /mnt/your-mount-point"
Then to mount: "mount.cifs //[IP_Addr]/[FolderName] /mnt/[your-mount-point] -o username=[WindowsUser]"
The gory details are in "man mount.cifs"
You can use the 'smbclient' package, an ftp-like client to access SMB/CIFS files on networked Widows systems
If not installed: "sudo apt-get install smbclient". Then you can use "man smbclient" to get the detailed details.