Windows 10: A brain teazer

WEll, there's a puzzle I just can't solve, here it goes:
My friend has 3 desktop computers, two of those have W10 1803. He also has Linux (mostly Mint) on each one on separate disks. Also a bunch of assorted HDDs for personal files, no OS on them, mostly stores movies on them and formatted to NTFS.
Now this scenario. Whenever he connects them to any Linux system gets the message that it can't be mounted "Failed to mount '/dev/sdb1': Operation not permitted
The NTFS partition is in an unsafe state. Please resume and shutdown" If disk was connected to a computer with W7, also formatted to NTFS than no problem encountered in Linux. As soon as he connects them to a W10, without writing anything to them he can't mount them again in any Linux even on same machine.
He brought me few of those disks and on either of my W10/Linux Mint machines there's no problem. I can share files on both machines and OSs without a hitch. I had him install same Mint as mine on both machines and still same problem.
Sharing disks that were never mounted in W10 work fine in all Linux and W10 OSs
This is full message he sent me that he gets on all Liinux Mint (and few other Linux distros): .

Mirror mounting /dev/sdb1 at /media/buster/Maxtor 250: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000" "/dev/sdb1" "/media/buster/Maxtor 250"' exited with non-zero exit status 14: The disk contains an unclean file system (0, 0).
Metadata kept in Windows cache, refused to mount.
Failed to mount '/dev/sdb1': Operation not permitted
The NTFS partition is in an unsafe state. Please resume and shutdown
Windows fully (no hibernation or fast restarting), or mount the volume
read-only with the 'ro' mount option.

It looks like W 10 does something to disks as soon as they are mounted/connected.

:)

 

Brain School

Yes, there appears to be a way to do that on somewhere from the Brain School menu.



My problem is that I didn't jot down the Key when I purchased Brain School.



Where can I find that info or who can I get it from?

 

Brain Challenge

Sir,

I hearbly request you to send me nokia c5 brain challange game.

thanking you



Abhishek